Following that logic, it should require the 30% until the costs of R&D are covered. This is monopolistic behaviour. I write an app, can't install on someone's

Following that logic, it should require the 30% until the costs of R&D are covered. This is monopolistic behaviour. I write an app, can't install on someone's device without paying apple? Want 30% fine but it's my device, I should be able to put whatever I want in there. Let's face it, the best price is when people complain but pay. This is just extracting more money, plain and simple.