That way bound to happen any days. Now that mixers are gone (almost) from bitcointalk, they have to go somewhere to advertise their brand. Hence the alternative altcointalk. And the altcointalk administrator are surely taking this as an opportunity to increase their site traffic. As we know we have a large numbers to campaign participant.

Even if the signature feature is removed, people will keep posting here no matter what. There are many users who doesn't even have any signature added but posting tons of reply everyday. Signature do have a big part in the forums traffic but what I said above is also true.