Eyeopener for many people here. DOJ addresses this and I think the 30% cut will go away if DOJ wins the case.
Wording from the suit.
"When developers imagine a new product or service for iPhone consumers, Apple demands up to 30 percent of the price of an app whose content, product, or service it did not create. Then when a consumer wants to buy some additional service within that app, Apple extracts up to another 30 percent, again for a service Apple does not create or develop. When customers buy a coffee or pay for groceries, Apple charges a fee for every “tap-to-pay” transaction, imposing its own form of an interchange fee on banks and a significant new cost for using credit cards. When users run an internet search, Google gives Apple a significant cut of the advertising revenue that an iPhone user’s searches generate."
So, the DOJ and attorneys of 17 states believe that Apple's behavior is rent-seeking.