it's called gimmicks
Make a stamp like that's saying "M if for MONEY"
But it's true, much of the M-rated content in movies and games has no relation to the movie/game. quite sad, actually. I do not mind mature content; I just wish they'd leave out unnecessary scenes in general, regardless of their rating. When the profanity or sex have a role in the plot, they are much appreciated. otherwise, they are stupid.