I think what your missing is that these aren't one-off user initiated purchases. I back a couple of patterns that are a per-video model, so if the content creat

I think what your missing is that these aren't one-off user initiated purchases. I back a couple of patterns that are a per-video model, so if the content creator produces 2 videos I'm charged 2x $amount that month. If they produce nothing I'm charged nothing. Apple doesn't provide a way of doing this. In the scenario you described I'd have to monthly count up how many videos said content creator produced and manually submit an order through the app... And users aren't going to do that. Hell, I'm not going to do that.