Facebook, Instagram, Snapchat or Youtube are going to get replaced only because they do not offer rewards. Even now if they start offering it, they just can't manage that because we have tons of Spammers already on it. Whereas on Steemit, Dtube, Dlive and other platforms, it's hard to keep yourself on the top if you Spam or scam the people with crap posts and content.

The audience is intelligent and capable of producing high quality content on regular basis. People support each other's posts by upvoting, resteeming and commenting and on the other hand, Facebook makes everyone hate each other - Jealousy Prevails.

You are absolutely right @lexiconical in saying that this is the starting of the downfall of facebook. It is already dealing with the shitty user experience on feeds. It's not going to get better from here.