That's very noble of you to address how much CEO's make off of their projects when they hit it big, but they also take on the risk of the whole project/company and while yeah it's very selfish to as you said take 1000x more payment than they should for their "work" I believe a 10x is not too bad.
Bonuses will come in the form of zing doing well instead I believe, I'd rather do something longlasting for the game than give people 10x higher pay, but of course slightly higher pay would be okay to make sure devs wanna continue staying with the project and focus on it when it becomes bigger.