Sextein, I know you're pissed off with this, but at the end of the day, one company made sure they would get what they wanted, the other didn't, and like it or not, you're going to have to deal with it one way or another.
Rockstar aren't 'sleeping with Microsoft', they need money, and so do Microsoft. The $50mil from MS is to try and get more back from sales, and of course, Rockstar are getting $50mil to both fund the DLC and maybe use some of it on other things. I can guarantee some die-hard GTA PS3 fans will switch to 360 just to experience the DLC, and that's what MS want. As well as people purchasing their DLC to begin with.