I see it more as a way to assign value to the concept. If one pays for the access then someone is more likely to do something with it. I once met some guys that

I see it more as a way to assign value to the concept. If one pays for the access then someone is more likely to do something with it. I once met some guys that would offer free lessons in jiu-jitsu at the local college, but they had more students once they started charging. The legal agreement is an interesting thought. As for a barrier to low-quality apps, it doesn't seem to have worked.