The developers, for the most part, get no payment. They create out of love and seeing a need. Their compensation is not direct. If they create a successful application that people flock to, they will get rewarded. And, if it becomes big enough, they can create their own token like the Appic group is doing.

I would not be surprised to see Zappl and D.Tube have their own tokens at some point...and many more on here.

And creating a token for a popular app, I imagine is very profitable...a lot more than working at Facebook.