The most ridiculous thing is it's a 30% cut on all in-app purchases and not allowing an alternative payment provider.

For in-app purchases the service is ONLY a payment service and nothing more.

Industry standard cuts for payment providers are lessen then 5%, often much less like e.g. 1.5%.

So IMHO this is basically extortion.

For app purchases it's still an absurd cut as nearly all "costs" apple has per app are fixed. The cost which are not are super small.

Furthermore most other "running" costs are more associated with the user then the app. (E.g. Os dev cost).

And if you now want to argue with "but they provide a messaging service" and similar don't forget that they effectively prevented any 3rd party message services (btw. google did so too). So we can't even say if it's a grate service, we have no realistic comparison as any was already killed at he roots before it could came to be.

Just imagine Microsoft effectively ("de-facto") preventing you from using any mail service but Outlock and also forces any "notifications messages" through Outlock and also prevents applications from using polling effectively so that you have to use interlock any messenger, chat app, and similar with Outlock or it won't work properly.

This would be ridiculous, but that is basically what Google and Apple did on smartphones.

So yeah, basically Apple de-facto forces you to use a set of services you might not want to use while taking extortion level cuts for what is basically a payment service (which is also forced onto you) and reasoning that "they need to do so because all the nice services they provide for free".