Why does Microsoft rely on timed exclusive DLC so much?

[Figgycal]

MB1025 said:

Mmmfishtacos said:
Jay it dosnt work, and people like me avoid buying dlc that does this. Ill just move on to a new game. No big deal.

These companies have numbers to back up their claim. Why do you think it happens all the time? What is your proof?

Look at the sales of Call of Duty games before and after the exclusivity deal and GTA 4 for 360 and for PS3. Ps3 got Battlefield map packs 1 week early and PS3 got exclusive DLC for Portal 2. It doesn't make a difference. It just makes people who own the other console upset that they're paying for a lesser product.