> Apple does it with their App Store, and without their curation, probably the store would have turned into a bigger garbage pile than it is now, to the point of being unusable.

Ummm, I know its not your primary point, but I'm not entirely sure about this statement. Look at the android app store (Google play) in comparison. It doesn't have that same curation as the Apple version, and certainly there are a lot of useless apps on it, but it is by no standard "unusable". In fact, in my experience, I prefer looking for apps on the Google version than the Apple because for almost any purpose its easy to find an amateur low cost or free app. This generally isn't the case in the apple version