The rule applies to every member here and to every thread on the forum. If you make a for-sale post in any other thread on this forum, the penalty will be in effect.
As far as the threat not meaning much either, this forum offers a buy and sell area as a favor to its members. The form does not make any money from any of the transactions there. If you don't find that valuable, that's fine. And I'm sure you won't mind being banned from there when you test us on this.