You may not realize this but, every cellphones gps is tracked and bought and sold to various companies every day. Every minute of your physical location and identity. Every ad you see, your search interests, also for sale by the petabyte. Your browsing habits, your purchases, even your social media data has likely been bought and sold. Your ISP also sells your data, likely to advertisers.

The FBI actually recently purchased a bunch of this kind of data because the governments restrictions would t allow for it any other way.