I think these free to play might be more of just 'pick your own price'. That way they get people that wouldn't pay 60$ for a mobile game and also people that would pay 1000$ for a game.

While I personally don't like it, because it feels like I'm getting an unfinished game if I don't spend a lot, I'm sure that there are many that enjoy this model and don't mind it at all.

And at the end of the day, these people that spend more money are actually the ones that feed the developers~