Google has collected billions of credit card transactions, containing personal customer information, from credit card companies, data brokers, and others and has linked those records with the activities of Internet users, including product searches and location searches. This data reveals sensitive information about consumer purchases, health, and private lives. According to Google, it can track about 70% of credit and debit card transactions in the United States.

Do not be surprised as they'll be making ton of data specifically merging all your email, browsing and GPS data with it.
And later will sell it to anyone who pays. Like firm you work in, HR firms reading your resume, medical insurance companies, etc.
It'll happen much sooner than you expect.