Google faces a simple equation.
1. Advertisers are always screaming for more detailed market information.
2. Google is sitting on a treasure trove of its users personal data.
As I've written recently, it's only a matter of time before Google starts chipping away at their self-imposed wall of privacy and starts selling more data. Water only wants to flow downhill and unused inventory only wants to be converted into cash. It's the natural order of things.
Google makes more money from iOS than Android
Profits over Privacy? Go Android!