Pewdiepie is an exception. Kind of like Conan's Clueless Gamer segment. But he just that, he's an exception. You can't take Pewdiepie and extrapolate to all streamers.
Adding that to my suggestion for splitting revenue, maybe it should be a sliding scale based on audience size. If you've got an audience of 10 people you get 1%. If you've got an audience of 10 million you get 99%
Royalties to the game creator for usage seems fair, but the player should get more.