I just give you, a multinational retailer, all my personal information and continue to give you my purchase history so you can build an advertising profile on me and I can get nearly 1% of what I spend on groceries back to spend at your stores, where you can easily raise prices by 1% to cover the expense?
Supermarket loyalty cards are super sinister.
I just give you, a multinational retailer, all my personal information and continue to give you my purchase history so you can build an advertising profile on me and I can get nearly 1% of what I spend on groceries back to spend at your stores, where you can easily raise prices by 1% to cover the expense?
What a great deal...
Or, I create a forwarded email address, and give them bogus info. I get around purchase limits on good sales, while they get partial data.