Google had a brilliant advertising business with AdWords originally, where the ads were simply based on the search term and not a bunch of Orwellian surveillance on the person searching. From the research I've seen, all this privacy-invading crap doesn't even improve ad performance much - it's small incremental gains at best. And per this article, those gains are clearly coming at the expense of user trust and goodwi…
Which research? From my experience, personalized ads perform ~50% better than non-personalized ads. This would also explain why Google and Facebook are fighting tooth and nail to keep their tracking infrastructure.