You're not getting the issue at all. COD DLC comes out a month early for xbox users, they pay $15 for it. PS users pay nothing because it's not available to them. Destiny DLC comes out at the same time for PS and Xbox and costs $20. Xbox users have to wait a year to play all of the content that both PS and xbox users paid for. xbox users aren't getting a discount on the things they don't get to play for a year, they have to pay the same price for gimped content.