a) we were not developing for just for iOS. Our service is not an iOS only App. Our iOS App is just a tiny part of the whole package. b) We knew App Store was

a) we were not developing for just for iOS. Our service is not an iOS only App. Our iOS App is just a tiny part of the whole package. b) We knew App Store was the only channel, we also knew paid apps have to pay 30%. We, like many other people here, just were not aware that cloud storage apps were required to pay a 30% fee too.