No, I don't need to assume, they have a nondisclosure in place in the EULA. They do not trade or sell this data to anyone. They further restrict their providers, even those who advertise in iAds, to have equally strict rules for handling customer data. In no way does Apple use tracking cookies, scanned messages, or anything else to target you with ads, or allow their partners access to that data ever.
Apple wants 30% from devs and is getting stricter with it because people MAKING MONEY off apple, through apple's systems, and backed by apple support, should have to pay. A free app with a $100/year external subscription that apple never sees a penny of is simply dumb, no company would make that deal for a $99 once annual fee to submit an unlimited number of apps. They're not evil, they're a BUSINESS.
As for apple hardware, you pay a small premium, true, in some product classes (in others, Apple is actually cheaper, like the 27" iMac and the mac pro, and the MBA line). That said, the TCO of apple is easily understood to be cheaper. Lower maintenance costs, lower license fees, less to license, cheap upgrades, and VERY high resale value. Most people get this, only trolls can't see it. Purchase price is ONE PIECE of ownership cost. If you choose what to buy based on retail price (which no one need pay), and never look beyond that, you;re a moron, and I applaud you being seperated from your money. I'll keep buying that "expensive" apple hardware, and when keep selling my used kist for $500-900, and use that towards the new machine, making my better equipped machines cost less than yours, I'll be laughing all day.