As for rude: you just demonstrated it. If you think you're giving away 70% of "your money" you don't get it. You're getting a 40% commission of THEIR MONEY. Your money has been made of the backs of creators, and to turn around and call those indie label executives shitheads doesn't endear you to anyone no matter how many concerts you go to.
The only accusations being made, not by me, are the ones in the lawsuit: which claim that Grooveshark executives were uploading content illegally to their own system. If true this is one of the more offensive things I've ever seen from a startup.