I think its allowed only when used in signature campaign or a direct link from a signature code. Ive seen some allowing it. But posting referral link isnt allowed based on rules. Anyway thanks for clarifying if this true, but for the sake of the rule which clearly state no referral code(link), better for others to follow not to post it.
That's not true, you can check ANN thread in gambling board, many of them post their referral link.
However, if you are using the forum as a publishing platform to host something really substantial and useful, selling ads in that substantial work is allowed. To be eligible for this, your post must be in a topic that you started, and your post must be substantial and long enough to make the ad seem entirely insignificant. If in doubt, ask me.
Even the moderators consider @OP thread to be spam, he can always create a new thread without posting the referral link.
The punishment only make his thread deleted, it won't make him get banned.