Geoffrey A. Fowler, writing in The Washington Post:
I recently used my credit card to buy a banana. Then I tried to figure out how my credit card let companies buy me.
You might think my 29-cent swipe at Target would be just between me and my bank. Heavens, no. My banana generated data that’s probably worth more than the banana itself. It ended up with marketers, Target, Amazon, Google and hedge funds, to name a few.