클리앙 (Clien)
Platform · this deep dive is built from the official pages of the platform itself and of the tools that support it.
Overview
클리앙 (Clien) is a South Korean forum community: a set of themed message boards and discussion boards tied together by one registration and one set of rules. The layout is classic — board list on the left, thread feed inside a board, comments under a thread. There is no recommendation feed and no "brand profile" here.
The core of the site is a handful of general boards around which most of the activity gathers: 모두의공원 (Modu-ui Gongwon, "everyone's park"), 새로운소식 (Saeroun Sosik, "news"), 아무거나질문 (Amugeona Jilmun, "ask anything"), 알뜰구매 (Alttteul Gumae, "good deals"), 사용기 (Sayonggi, "hands-on reviews") and 회원중고장터 (Hoewon Junggo Jangteo, the members' flea market). Alongside them sit several hundred themed boards with the cm_ prefix in the address, covering everything from cars and photography to coffee and board games; the full list is visible right on the front page.
For a social media manager the platform is interesting because of a rare combination: ordinary advertising and self-promotion are banned here strictly and in plain words, yet there is a separate paid board where a company can post legally and at a published rate. In other words, the platform does not pretend that advertising does not exist — it has simply moved it into a designated place.
Who's here
The platform does not publicly disclose its audience in people: there are no member counts and no country or age breakdown on the pages we verified. The only reach measurement of its own that we found appears in the description of the paid promotion board: the platform promises that an approved post is displayed at the top of most boards, and estimates this at roughly 200 million impressions per month (월 약 2억 회). This is the platform's own claim in a commercial context, not an independent measurement, and it refers to impressions of the advertising block, not to a number of people.
The community language is Korean; the front page markup declares lang="ko", and the interface and the rules exist only in Korean. Registration terms confirm the Korean anchoring indirectly: the user agreement separately spells out the procedure for people who live abroad and cannot pass the usual identity check (article 6) — meaning the normal registration path is designed for a resident of Korea.
Getting started
Registration comes in two variants, and you have to choose up front. The registration page offers ordinary membership (일반회원가입) with mandatory identity verification and a minimum age of 14, or corporate membership (기업회원가입) followed by an application for access to the direct promotion board and approval by the administration.
The same page states strict account rules: one person — one identifier; re-registration is possible only 30 days after leaving (data is kept for 30 days, then deleted); using someone else's data leads to restricted access and liability under the law. The age threshold is repeated in the agreement: an application is rejected if the applicant is 14 or younger and there is no consent from a legal guardian.
One separate step is worth knowing about in advance: the platform requires email address confirmation. A pop-up on service pages warns that without confirmation your ability to write threads and comments is restricted, and that signing in from a new device means going through confirmation again — this is visible on the rules page.
The main consequence of corporate registration: a corporate member is restricted in the use of ordinary boards. A company cannot keep one account "for everything": either you are an ordinary member and you do not advertise, or you are a company and you publish only in the place set aside for it.
What you can publish
Formally the boards differ by purpose, and the rules require posting in line with the board's purpose. No limits on text length or attachment size are named on the rules pages we verified.
The prohibitions are spelled out in detail. Section 2 of the general rules ("you may not deceive other members or act in private or group interests") includes four points that bear directly on promotion: "you may not write advertising posts while passing yourself off as an ordinary member"; "activity for the sake of viral marketing, professional sales and promotion (of blogs, videos, apps) is prohibited"; "you may not act for personal gain — posts made for the sake of an image link, referral codes, repeat posts made to gain permissions"; "you may not shape a positive or negative opinion of a person or organization in bad faith".
Section 3 closes the workaround via second accounts: using two or more identifiers, or one identifier used by several people, leads to restricted access; the exceptions are operational necessity, administrator permission and use of the direct promotion board (added on 18 May 2026). Note that the exception for the promotion board was written into the rules as a separate dated amendment.
The rules of the good deals board add their own: you may not use the board in the interests of a particular person or an outside organization; referral links and referral link "relays" are prohibited; you may not post promotions that reward signing up or subscribing.
How to grow
Organic growth here is possible only as participation: writing to the point in themed boards under your own name, without posing as an outsider. The platform describes no algorithmic feed, no recommendations and no built-in analytics; there is no advertising dashboard in the usual sense either.
There is exactly one legal paid channel — the 직접홍보 (Jikjeop Hongbo, "direct promotion") board. Its rules describe the whole procedure: only corporate members may post; a new post may be placed no more than once a day; after approval the most recently placed post is displayed at the top of most boards for the paid period, so there is no need to write a fresh one every day.
The rate card is published openly: 7 days — 44,000 won, 15 days — 66,000 won, 30 days — 99,000 won, 60 days — 198,000 won. On the same page the platform compares itself to the market: ordinary advertising products cost 50–1,000 won per thousand impressions, while direct promotion works out at about 0.2 won per thousand impressions, that is 100–2,000 times cheaper. The calculation belongs to the platform and rests on its own estimate of impression volume.
The paperwork is described in numbers too: after submitting an application you must transfer payment to the account within 7 days, or the application is cancelled automatically; the administrator approves an application within 24 hours; if it is refused, the payment is returned.
Path to monetization
The platform does not pay authors. There is no ad revenue share, no donations and no affiliate programs on the pages we verified; on the contrary, referral codes and links are prohibited outright by the general rules and by the rules of the deals board. The money flows from the company to the platform — through payment for placement on the direct promotion board.
The only way to earn money here is to sell something directly: for that there is the members' flea market and the commercial boards. But that is trading, not content monetization.
Tools and automation
We found no official programming interface: there is no developer section and no API documentation on the platform's public pages. We also found no scheduling or analytics services whose support for Clien is confirmed by a source.
The practical conclusion: work with this platform is manual. What is more, automation here sits badly with the rules — repetitive posts fall under the ban on "excessive use of special characters and posts and comments of a 'flooding' nature", and blasting out mailings in private messages falls under the ban on spam messages.
The only "tool" for a company that the platform provides itself is the application form for the direct promotion board and the administrator review that follows.
Limits and rules
- Age and identity. From 14, with identity verification; one person — one identifier.
- Coming back. Re-registration — no earlier than 30 days after leaving.
- Self-promotion. Viral marketing, professional sales and promotion, as well as advertising posts made in the guise of an "ordinary member", are prohibited.
- Referral links. Prohibited by the general rules and separately by the rules of the good deals board.
- Deception on the paid board. Promoting your own goods in other boards while posing as a member, propping up your own post with comments from "members", deliberately disparaging competitors and misleading people about other companies' goods lead to deletion of all posts, an account downgrade and refusal of a refund.
- What may not be advertised. Loans, adult products, pyramid and network schemes, counterfeits and stolen goods; advertising of condoms and adult products is separately restricted.
- What is advertised with reservations. Credit cards, insurance and medicine — with references to the Korean laws on financial services, on insurance (articles 97 and 98) and on medical practice (article 56).
- Headlines. Special characters and excessively shouty headlines are prohibited on the paid board: a first violation brings a warning, a repeat one brings restricted access.
- Matching the application. You may advertise only the product named in the application; if they diverge, approval is withdrawn without a refund.
Who it's for
It suits companies that work in the Korean market and are ready to play by the platform's rules: register a corporate account, give up taking part in the ordinary boards and buy placement on the direct promotion board. The cost of entry is low for an international market — 44,000 won for a week — and the terms are published openly, with no negotiation with a sales department.
It suits niche products aimed at a technically minded audience: the set of themed boards on the front page leans towards technology, cars, photography and similar interests.
It does not suit anyone counting on a "soft" presence through an ordinary account that mentions the brand: that is exactly what the rules call viral marketing and prohibit. Nor does it suit anyone who needs measurable statistics: the platform gives an advertiser neither a dashboard nor reporting that we found any mention of.
Verified data
The checked data this deep dive rests on.
Getting started
without confirmation of an email address, writing threads and comments is restricted; signing in from a new device requires confirmation again
A pop-up on service pages
source, checked 2026-07-28
Account and access
two registration types: ordinary membership (from age 14, with identity verification) and corporate membership with an application for the direct promotion board and approval
A corporate member is restricted in the use of ordinary boards
source, checked 2026-07-28
one person — one identifier; re-registration is possible only 30 days after leaving
Data is kept for 30 days, then deleted
source, checked 2026-07-28
Business terms
the official format for companies is the 직접홍보 (direct promotion) board: only corporate members may post, and a new post may be placed no more than once a day
After approval the latest post is displayed at the top of most boards for the whole paid period
source, checked 2026-07-28
Advertising
the platform estimates the advertising block at roughly 200 million impressions per month (월 약 2억 회)
The platform's own claim in a commercial context, not an independent measurement
source, checked 2026-07-28
the platform states: ordinary advertising products cost 50–1000 won per thousand impressions, while direct promotion is about 0,2 won, that is 100–2000 times cheaper
The platform's own calculation based on its own estimate of the number of impressions
source, checked 2026-07-28
after an application is submitted, payment is made within 7 days or the application is cancelled; the administrator approves within 24 hours; if refused, the payment is returned
The application procedure
source, checked 2026-07-28
loans, adult products, pyramid and network schemes, counterfeits and stolen goods are not allowed; advertising of condoms is separately restricted
Credit cards, insurance and medicine — with reservations under Korean law
source, checked 2026-07-28
promoting your own goods in other boards while posing as a member, propping up your own post with comments from «members» and disparaging competitors lead to deletion of all posts, an account downgrade and refusal of a refund
Point 8 of the direct promotion board rules
source, checked 2026-07-28
Pricing
placement on the direct promotion board: 7 days — 44 000 won, 15 days — 66 000 won, 30 days — 99 000 won, 60 days — 198 000 won
The rate card is published openly
source, checked 2026-07-28
Restrictions
viral marketing, professional sales and promotion (of blogs, videos, apps) are prohibited, as are advertising posts made in the guise of an «ordinary member»
Section 2 of the general rules
source, checked 2026-07-28
referral codes and links, referral link «relays» and promotions rewarding sign-up or subscription are prohibited
Rules of the 알뜰구매 board; a general ban is also in section 2 of the general rules
source, checked 2026-07-28
using two or more identifiers leads to restricted access; an exception for the direct promotion board was added on 18 May 2026
Section 3 of the general rules, a dated amendment
source, checked 2026-07-28
Legal
an application is rejected if the applicant is 14 or younger and there is no consent from a legal guardian; a different verification procedure is provided for those living abroad
Articles 6 and 7 of the user agreement
source, checked 2026-07-28
Languages
the interface language of the home page: ko
The language is taken from the markup attribute, the versions from hreflang
source, checked 2026-07-28
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