I'm kind of wondering what drove this move to a paid app. Driving away pathological customers? Increasing app quality? Somehow tying every OS X and iOS app--f

I'm kind of wondering what drove this move to a paid app. Driving away pathological customers? Increasing app quality? Somehow tying every OS X and iOS app--for sale or otherwise--to an identity/credit card? If it's a signed app, they could in theory attach some signature to everything you build, even for Cydia or the like.