Frankly, it's much less problematic than Google writing a blog post bragging to it's advertising customers that it has started buying a copy of everyone's credit/debit card transaction data so they can spy on potential customers more than ever.
> as Google said in a blog post on its new service for marketers, it has partnered with “third parties” that give them access to 70 percent of all credit and debit card purchases.
So, if you buy stuff with a card, there’s a less than one-in-three chance that Google doesn’t know about it.
https://www.technologyreview.com/2017/05/25/242717/google-no...