Do you know how we know it's Microsoft?



When Final Fantasy XI came out on 360, it allowed cross play with PC and PS2 on the same servers because Microsft were trying to court Square Enix....



Fast forward to Final Fantasy XIV and Sony have it as a console exclusive title, simply because, as stated by the developers, Microsoft are against any sort of "cross platform" play with the other consoles. The developers felt limiting the play base to just XB users would have been too small a userbase and it needed the other players to make it worthwhile so, it just never happened.