First question you might be asking, is why would you want to do this?
Well, the answer is, with the current Premium Payouts system, it’s impossible to have a game that uses CC-BY-NC assets and follows those terms, as you’ll always be making money on the game, regardless as to whether or not you monetize it. This poses an issue for developers who have permission to use assets in a non-commercial way.
My proposal would be an option under game settings that would allow the developer to turn off Premium Payouts for a specific game.