Aren't those pretty much the apps that apple promotes? I remember a article a while back that went over how the App Store was geared towards really cheap Apps and that was in Apple's best interest because they need many apps to sell hardware.
Is there really a difference to the end user if your store has 10M apps vs. 9M apps? I think we've hit the point of diminishing returns on the quantity front years ago.
Its like bemoaning Microsoft (or any OS maker) that allows people to create apps - apps that may or may not use advertising.