This. Apple really wanted iAds to take off. Remember when they were charging a minimum $1 million buy in, because they felt that selling ads to Apple users was worth so much more money?
However, Apple's target audience failed to buy like they were supposed to, so iAds has continuously dropped in price and popularity among advertisers.
Not to mention that Apple only took the money and never gave the users anything in return, unlike Google with all its free services.
Typical Apple handwaving. You'll notice Apple only named certain information vectors, and carefully avoided listing the things they DO collect and sell, such as our credit, demographics, locations, buying preferences from iTunes, etc:
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As pointed out here many times before, each person's Google Dashboard has had much more info than Apple will ever tell us about what they collect, and very similar control abilities to turn it off.
TL;DR - Whenever Apple makes an announcement, look carefully not at what they
did say, but at what they
didn't say. The former is always used to mask the latter.