But Microsoft is just the operating system, Steam is the distribution service.
Ahhh....Suddenly this all makes sense now. Hmm, so this is all because of M$ battle against Steam's market. Think about it. What are the primary facilitators of Steam?
PC and PS3.
Who are the guys getting shafted in this scenario?
PC and PS3.
M$ knows that cultivating the PC market isn't worth it anymore, because Steam is slowly, but surely, cornering it with their superior business ethic. So they're basically bribing Beth for these exclusivity rights so they can get their capital first, which means Steam/Sony's capital will suffer from second hand sales. I think it's M$'s aim to have these exclusivity rights hurt the sales of PC/PS3, and for Beth it's not really a bad thing either since they get the extra cash from M$.
Very clever, and I think its working well in M$ favor. Unfortunately, the gamers lose.