Let me quote here the reasons why you were banned, it's because of selling cracked/stolen or hacked accounts that require kyc information of someone else.
Although it wasn't listed on the rules
[1] but these rules are particularly posted and sticked in invites and account board enough for you to read and understand, unless if you just don't care about it.
Trading the accounts of these services is not allowed. Report anyone selling them. Newbies will be permanently banned; established members may be given warnings before being banned, but the relevant posts will be deleted.
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Services are added to this list when we come to believe that essentially no trades of such accounts are following our rules, which prohibit for example selling hacked accounts, accounts requiring KYC info, accounts created using stolen identities, etc.
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This list only applies to sales of accounts, not invites, codes, etc., though sales of the latter items must still follow our usual rules.
[1]
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