Twistedpixel on 20 January 2010
Its quite likely that they simply said "We will take no or little cut off the map packs for so long as they are exclusive to our console". Considering what I've heard about the relative online sales between the PS3 and Xbox 360, the difference in fees Microsoft didn't take could very well be as much as the revenue on the PS3 version.
Edit: Alternatively Activision is pissed off by something Sony has/is doing such as charging for bandwidth to deliver demos and this is their way of twisting their arm.
Do you know what its like to live on the far side of Uranus?
