I don't agree. It is a fair question to ask how much value do both stores contribute to their business. If Apple and Google provide more value to the business t

I don't agree. It is a fair question to ask how much value do both stores contribute to their business. If Apple and Google provide more value to the business than they take away then a lot of the arguments about how fair these charges are, melt away. When people pretend they are arbiters of what is and isn't valid because they don't consider it fair it stops any avenue of investigation because they consider it forbidden. As much as I don't like Apple or their store, if they are going to provide value I am going to work with them. Pretend that for a minute that apple gave me a 10 fold increase on revenue. 70% of a 1000 is still more than 100% of 100. Also number of people sideloading an app on Android I would wager is negligible compared to store purchases and could be considered to be irrelevant. So again the question is how much of their revenue came from those stores and how much value does that add to the business?