This discussion has been had many times before, but you probably aren't aware of that unless your account is an alt of an older member, which I'd put the odds at 50/50 of being the case, probably better.

Were there any mixer campaigns prior to Chipmixer?  I can't recall there being any, just ones for various exchanges, casinos and the like.  In any case, any forum can do what they like.  Theymos could probably even decide to allow discussion and promotion of mixers if he wanted to, but he doesn't.  That doesn't mean bitcointalk is going to suddenly become a ghost town, and I can tell you with near 100% certainty that just because altcointalk became active (I'm not sure I've even heard of them) and that mixer campaigns are going away that this forum's going down the tubes.  This place is the place to discuss the king of all kings when it comes to cryptocurrency.

Now then, how many of these BS topics by apparent newcomers are we going to get?