Let's play a game of predictions. Regardless of HN's opinion of Facebook (and regardless of my own for that matter) I predict that this thing will work. This is only one thing my crystal ball showed me. Facebook's presence in developing economies is massive. To the point of being synonymous with "The Internet" in a number of places. But they've had a nagging problem. People in these economies consume contents, but do…
First, I fully agree with your "crystal ball". It's fantastic, you should lend it to me sometimes :)
Jokes apart, I think you're on point. Facebook's Libra will succeed. Amazon will try to compete with that, pending anti-trust fears. Google will try to have a shot at it and fail miserably.
It will be super interesting to watch this space evolve.