Do I have a choice, other than cancelling all of my MasterCard cards? This business of tracking and profiling is increasingly evil. If I dystopically discovered that someone has been following me around all the time, writing down everything I look at or do or purchase, in public and at home, I could not tolerate it.
Your only option is to refuse cards altogether because they've all been selling anonymized data on you for years. The big hedge funds pay big dollars for direct lines of data from the credit card companies.
Not just hedge funds. All finance institutions buy ( "share" ) data from and with each other. Even if you "opt out" ( we should be defaulted to opt-in rather than having to opt out but that's another discussion ), banks have a sneaky trick of slightly changing your ToS and giving you 30 days to "opt out" again. It's one of the reasons why every year, people get "new terms" in the mail. If you look closely, you'll see a slip of paper in the pile of papers about "privacy" rights and saying you have 30 days or so to let your bank know you don't want them to "share" your data.
Also, keep in mind that anonymized data is anonymous in a local sense, not a global sense. Even if PII is removed from one data vender, you can link anonymized data from a variety of data venders to "unanonymize" you. If you have one set of PII ( say like your employer ), then it's really effortless to link you with the anonymized data.
If you have search history from google, data dump from facebook and CC data, then one could pretty much peer into most people's homes and lives without much problem. You could know people better than their spouses do and in many instances, better than they do themselves.
The difference between a slave or serf and a free man isn't paid labor ( as even slaves were paid for their labor ), but the right to prevent intrusion into their lives. A free man had privacy. Slaves had no right to privacy. We are moving into a world with little to no privacy. Well not all of us. The wealthy are moving into a world of greater privacy.
Buying up islands. Highly walled and heavily guarded compounds. Opaque offshore wealth centers.