Maybe signatures are to be banned next ? 
NoRead what theymos talked about the reasons, not worth the time spent on it is there. To ban ads will not affect this forum traffic, but if signature is banned, there would be less traffic. Many people that supposed to be exposed to what bitcoin is properly will be unable to.
I don't think Theymos would actually ban signatures based on what they've said in the past. They've mentioned scrapping the ad space below threads and I think there was hope demand would drop before then or it'd be less effort to implement that system.
The first topics where he mentioned stopping with the ad slots were years ago and perhaps this is a time where users enrolled in signature campaigns can determine what's promotable and what's scam/worthless.
I wonder if we'll get some new factoids coming out though soon? I'd support a community based project on that too if we have things/need tor ank things worth advertising generated by forum members here.