It's incredibly simple, and I don't understand where people are getting their ideas from. Xbox has a Bungie fan-base. PlayStation did not. Imagine if Destiny was marketed out to Xbox instead of PS. The PS community might not have been so keen on supporting it. So, now what they have is a legion of grateful PS players who consider themselves huge Bungie fans, and a bunch of Xbox players who (even though they got short-changed) still love Bungie because of their past with them. Bungie wins.