

It’s logical but it probably scares away some customers. That’s why the “just eat it” option exists. iOS gives you access to an enormous market and payments are slick and easy. Creators may want $5 but if they can get 30% less from 500% more people, it’s still a good business for them. There’s no strict reason why they must obsess over taking 100% of the sticker price. There are a million examples of businesses who are willing to accept a discount for high volume business.
We can safely assume that alternative app stores would have less effect on iOS than they have on Android, where Google desperately wants others to step in and develop their ecosystem. And they aren’t very significant on Android at all. I tried distributing my app on Samsung Galaxy in addition to GPlay and despite its preferential positioning with the world’s largest phone maker, I got peanuts for installs. Not even a rounding error. I literally took the app down. Oh and then Xiaomi got banned from the SDK and they stole my APK for their third party app store and began sending me bug reports about how it was “broken” there. Ah yes the power and glory of alternative app stores… Apple are wise not to dump this cesspit into their ecosystem, which people love because all they want is one decent, unified default that works well.