They created the game but eighteen year old Nicholas Grayson mastered the rules. It becomes clear about 25% into the book that the so called game is really Matt (who is gay) manipulating his so called best friend. He forces Nick to video tape his sex with different girls and then pays Nick. I think some of them bet about how long it would take for Nick to get the girls to the actual act of sex.
It is also a while before you realize that Ellie is African American, not that it makes a difference. I would have liked to have heard it in a different way. The characters were bold, crazy, and certifiable at times. There were so many instances where Nick berates and belittle girls and I cant for the life of me understand why anyone would sleep with him.
The premise is a good one. They make a bet, name a target and Nick has to tape a sex scene.