No body know's why Bungie/Activision chose to make Destiny DLC exclusive to PS. The speculation doesn't help. All of you think it was just because of money. Maybe Activision wants a DLC exclusive franchise for PS user as it already had COD for xbox users. Maybe Bungie had a "falling out" with MS and took Sonys offer, regardless of the dollar amount. Maybe developers dislike the kinect and choose the PS4 as the platform of the future to focus on. Or maybe, just maybe, Bungie pitched Destiny to MS and they said no, make another Halo. So Bungie went elsewhere.