Almost Dead Forums VS Social Networks

There's no need to look for statistics to say that most of non-large-social-net forums either almost dead, or dead. At the same time such giants as fb or insta only proliferate. This is not only unfair, it shows the tendency of degeneracy of many people. Indeed, people on those platforms are getting mind elision, and their power of individual and independent critical thinking is about to reach zero. 

Can it be done something to stop it - I'm very doubt of it. Anyway at least, there's a way to double the visitors on almost dead forums to make them work better, than those giants? This idea isn't worthless; how to realize it - this is a big question.