wouldn't have sold more just for not being exclusive. The ps3 version will still sell 500k , maybe inch its way up to a mil. I bet next week's sales will be higher as some former killzone 3 fans return their games and pick up bulletstorm. It was just a bad move to release it for the ps3 that week. It would be like someone releasing a new zombie franchise the same week as left4dead2. Initially everyone is going to pick left4dead2. Then the fans who end up being dissappointed, you can't please everyone, will end up returning their game and trying out the new zombie game.
It could have sold more with a much bigger advertising campaign, but it didn't need to be exclusive to get it. Call of Duty shows the vast majority of players on both systems don't care at all whether a game is exclusive.
