No customer would buy Apple's products, which they sell with large profit margins, if Apple would not invest in its operating system and maintain a way for developers to distribute apps.

Therefore I would challenge the idea that it is fair for developers to pay Apple a 15/26% commission for the privilege of distributing apps.

If developers were one single business that Apple has to deal with to get third party apps made for their phone, they would be paying us a commission instead of the other way around.