Everyone who has been in this business for any amount of time knows that one earns the most money from only a handful of players. Big players.
That holds true in rev share, but it holds even more true in this model. A whale who wins and plays it back makes you twice as much here, first you get paid for him/her wagering in order to win, then you get paid for them losing it back. The fact that they win in the interim would wipe you out and make you start over in rev share, but here is is irrelevant and you just keep adding revenue.
Yes, having lots of small players who enjoy the entertainment value keeps you earning in months when you do not land a big player. But it is not where your major income is at, with either model.
A single winning whale in this model can offset a lot of average or below average months.