Imagine what would happen if the big social media giants started taking part in this and integrating it so that users would be more apt to interact with the platform due to potential to earn from it.
All those stalkerish type posts you see on Reddit and the like, met an old hot friend and you're going through all her photos and "accidentally" hit like one of them, it's suddenly not as creepy, especially since that can earn the person a reward for the like.
I don't see that happening though for the likes of the giants, not for a long time at least. It's a common thing for legacy company types to hold on the legends as hard and long as they can.