If gambling campaigns find another place to promote, they will inevitably stop promoting here, regardless of the quality of the posts.
I already see some sponsored by some casinos posts on Twitter. Others now have their own forums and activity is not bad at all because it just a collection of only gamblers. The advantage Bitcointalk had/has onto of being the oldest crypto forum is that it's one place where a service looking for crypto related clients would find a collection of them. Twitter and Facebook just has a mixture of different users, some of which still think Bitcoin is scam and others completely don't even know about the existence of bitcoin.
This is what happened with mixers, which was moved to another forum, although the results was not guaranteed.
The Mixers were the perfect only Bitcoin service and the only place they would get clients, at least on the clearnet, without being demonized was this forum. I don't think them making paid posts on Social media would help/work for them.