If you know that joining new social network gives you nothing and it has less users than the old ones then you hardly will register in this new network. You have all your friends in Facebook, why would you join other network? If the only chance to get paid by new network is to appeal whales than with user amount of 100k or 1M it would be literally impossible. So there is no difference where to read (consume) interesting stuff, on Steemit or on Facebook.