Earlier quoted context omitted.
They make their money off the hardware though. And plenty of people use Apple hardware without using Apple services. I have an iPhone/iPad/Mac, and don't use Apple services for email/document/storage/photo backup etc. I appreciate their OS software and hardware, but for the most part think there are better options for pretty much all of their services.
Does not matter. When you buy an Apple product, you are basically supporting their services as well. And as far as I know, you are more or less forced to have an iTune account if you have an Apple device, right ? So you are tied in to their services at least for the distribution of applications (on mobiles).
An iTunes account is required for App Store purchases, but that's about it. You can load on Google e-mail, maps and browser after that, if you wish. The point is that Apple doesn't make money from its services, so it has less of an incentive to stop you.