Honest question, what do people think is a fair percentage? The platform development, app hosting, payment processing, and quality control is surely worth something .
The honest answer is that Apple shouldn't own iOS and its main app store at the same time. But there is not legal / regulation framework to prevent that. Case in point: Steam is taking 30% too. But you've heard much less fuss over it, right? Why? Is it because of players' cult-like behavior around Steam? (probably partially) But more importantly it's because Valve doesn't own Windows and Steam Deck is a far smaller f…
Cult-like or not, I find it reasonable to support companies that do things which you agree with. Valve's non-adversarial approach to business (as opposed to many rent-seeking corps these days) probably helps that perception.