Of course, a stingy person might point out that in games like Day of Defeat: Source and Red Orchestra we're getting bonus materials just as good as the Call of Duty 2 map packs for free. Indeed, there was a time (once upon a better time...) when we got all map packs and expansions for free. EA tried selling smaller expansions for PC games, like the Battlefield 2 booster packs, and the exercise has largely been a failure - trying to find more than about a half a dozen good servers for Euro Force or Armoured Fury, the two booster packs for BF2 to date, is an exercise in futility.
From this article:
Hehe, looks like the devs are on to something