I don't know about ending the forum, but he might want to consider who he'd hand over the reins to should he want to end his involvement with it or if something should happen to him.  My guess is that he's pretty well-off and has been for quite some time--and yet he still seems passionate about (or at least very involved with) bitcointalk--so I don't think he's in this for the money primarily.

Anyway, I can see why mixers were banned even if I don't like it.  Crypto casinos have yet to be called vehicles for terrorists, money launderers, or what have you by the government....but that doesn't mean it's always going to be that way.  Should they get banned like mixers, that would just suck because it'd be another knock against freedom courtesy of whatever government agency put pressure on Theymos (or his successor) to enact that change.  Whether you're a gambler or are against gambling for whatever reason, people ought to be free to make choices for themselves.  You know, just like out in the real world where there are tons of massive casinos that governments make a lot of tax revenue from.