Lol, if they charged us 10 dollars for the content, they would have made more money than they would selling hte game on PC. You can blame this ALL on MS acting dicky to Epic, and the same goes for the time exclusive shit with PS3.
I do think that after GOW is a platinum hit, it will be printed to have the new content, which they will then charge us for. They jsut want to boost PC game sales by makign them feel special, and then by the time GOW is a platinum hit, the PC sales will level off, and they will bring the content to the 360 to make even more money.