No one is getting screwed over.
Everyone thinks they should be heavily rewarded for the success of a game that makes a lot of money.
It's one song.
People worked on this game for years, why does this guy think he should have an exorbitant return on something he wasn't involved in making?
If anything the game would help bring more exposure to his music. If you're not interesting in the amount, say no thank you and move on.