This is the only reasonable suggestion I've heard, but it's still very messy because it would not only require even more careful policing of app code, but mostl

This is the only reasonable suggestion I've heard, but it's still very messy because it would not only require even more careful policing of app code, but mostly because Apple would have to invent an entirely new fee structure for apps under this umbrella. I think to do it fairly it would just end up looking like an AWS bill.