[strawberrypuree]

This is a sleight of hand on Amazon's part. Humans looking at a palm print and identifying the person is not a concern, it's computers looking at a palm, associating it with a credit card, which can then open up a trove of behavioral data to push (i.e., ads) to people. It's disingenuous, like putting someone in a tiger cage and saying "Don't worry, there's no way you can drown in here -- we made sure there's no water."