Earlier quoted context omitted.
As I understand it, 30% pays for all of the frameworks Apple develops that is available to you when you fire up Xcode, as well as everything involved with running the store, and they take their cut when you post on their store and sell stuff. If a law comes by and says Sorry Apple, you need to provide a way for other stores to exist in your ecosystem, well, something is going to have to pay for the development of the…
> As I understand it, 30% pays for all of the frameworks Apple develops that is available to you when you fire up Xcode, as well as everything involved with running the store, and they take their cut when you post on their store and sell stuff. Xcode is free, though. Apple 'takes their cut' when you pay $99/year to be a registered Apple developer. If that's not enough, then maybe they need to review the checkbook aga…
Unreal Engine is "free" too.
Except it isn't. Neither Unreal Engine nor Apple's developer frameworks (shipped alongside Xcode) are public domain or copyleft. They're both proprietary code available under a license that permits certain usages, disallows certain usages, is royalty free under some conditions, and requires payment under other conditions.
> Apple 'takes their cut' when
That's not for you to decide. Epic can decide when to take money from developers who use Unreal Engine, and how much they're entitled to. It's equally Apple's decision which payment represents compensation for the developer's use of their intellectual property, and how much they're entitled to.