It's also likely that Google buys a copy of your credit card purchase history. >Google has been able to track your location using Google Maps for a long time.

It's also likely that Google buys a copy of your credit card purchase history. >Google has been able to track your location using Google Maps for a long time. Since 2014, it has used that information to provide advertisers with information on how often people visit their stores. But store visits aren’t purchases, so, 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. https://www.technologyreview.com/s/607938/google-now-tracks-your-credit-card-purchases-and-connects-them-to-its-online-profile-of-you/ https://www.technologyreview.com/s/607938/google-now-tracks-... Finding that tidbit out was my own personal bridge too far.