If GGG beats Canelo, then he's the undisputed MW Champ. Pretty sure he wouldn't care how much he's making, as it's already much more than he's used to, given his upbringing. In other words, he would have done what other boxers are supposed to care about: best fighting the best.
GG won't ever become a ppv star ever because he has yet to face 1 serious threat. His wins over inferior comp makes the fight public more and more frustrated with his antics.