Apple

Apple argues that its opposition to 3rd party App Stores is that with only one App Store offering approved-only apps, it better serves customer's needs because Apple can oversee security and quality control. That sounds altruistic enough, but if that were genuinely true, Apple could minimise their fees to only cover these costs and no more. Instead, Apple takes a whopping 30% bite of not just the initial app purchase price, but every purchase made in the app. Apple are learning the hard way that the EU Commissioners weren't born yesterday.