I would not be surprised if Altcoinstalks owners/operators take a similar decision to theymos with regards to banning mixer but it seems highly unlikely now for two reasons. First is because the so-called crypto friendly US administration are making decisions. Second is because if they wanted to ban mixers they probably would have done it around the same time but they did not. As a precaution, the owners/operators might consider a ban on mixers or at least keep their options open.
That site wouldn't have any active users if not for allowing them to advertise mixers after Bitcointalk banned them.
I agree with LoyceV. That would probably kill altcoinstalks.
Forum has much smaller activity. SEO is basically inexistant (you can't find any topic in google searches), so organic traffic is very low.
I like that forum, but it is a much smaller forum which can't afford to lose those advertisers now. I see no reason to do that. Specially now with Trump administration which will probably has a more friendly environment for mixers. lets see...