I gotta ask, when did it become the 'norm' for pc gamer to pay for add-on's???
It still isnt entirely normal, theyre pushing things like microsoft's live and Modern Warfare's matchmaking systems on us to create environments that dont allow custom content and put in place the infrastructure to charge for these things.
I still cant bring myself to buy MW2, no way will I put money in the pockets of people who are doing their best to kill everything that makes PC gaming unique.