Or to create a more direct comparison, it would be like Netflix distributing content inside the Xfinity OnDemand app and using Comcast’s streaming platform to do it, and paying Comcast a percentage of the revenue.

Which is exactly how Xfinity OnDemand works.

Apple’s creation, development, and control of the App Store is akin to Comcast’s Xfinity OnDemand. They are both retail stores owned, operated and curated by their private enterprise creators in order to sell some first party but mostly third-party content.