Ghosts DLC Xbox Early Release - Justifiable?

My son bought a season pass for COD Ghosts back in December for £40. Yesterday it looks like the first round of DLC came out but as an XBox only exclusive; Playstation and PC players have to wait another month by the looks of it (touted date is Feb 27th)

My question is - how can Infinity Ward/Activision justify getting into the console war? They shift millions of playstation units and have millions of non-Xbox players (read: paying customers); they're one of the highest earning publishers, thanks to ALL of their customers, they certainly don't need any extra financial incentives from the hardware companies.

It feels like they're devaluing a huge chunk of their customer base, for an unknown reason. Surely it's not that Microsoft have just bunged them a wad of cash that they don't really need... (although that's probably the case)

Unfortunately I don't think that players will vote with their wallets (by boycotting future releases), which would be the only rebuke that would affect future decisions.

(This is all aside from the DLC good or evil argument - some might say that you've paid £50 for a game already, the updates that keep you playing it should be free!)

Anyway, just interested to get other opinions.