Every time MS pays to get an exclusive game/DLC (timed or not) it is a business decision. It's not only an investment for now (ie. more people will buy this from us now ehn it first comes out), but it is also an investment for the future (ie. more people will buy our console in the future because they know we will invest more in games down the road...they get a reputation as the console with more exclusives).
MS didn't get where they are today by playing it softly. I just can't believe that Sony has appeared so passive in this regard.