When you spend a dollar at Apple's App Store, up to 30 cents of that goes to Apple. Now, a US court ruling may change that radically — opening up a future where Apple collects almost none of the money users spend on apps.Emphasis on may: Developers and regulators have been complaining about Apple's App Store fees for years. And while they've won some battles, Apple has been able to keep its business more or less intact — which is a big reason Apple's services business, a core part of the company's financia ...