My friend just sent this to me after seeing it at a Whole Foods in California:
With how easy it already is to tap a card, why would anybody sign up to use this for payment? It's mind boggling to me.
Screw just your finger prints, Amazon already has access to that database thanks to the 5-0, so they now want to know every line on your hand! Best at least give people palm readings after the sign up! /s
It's not hard to obtain someone's biometric data. My concern wouldn't be Amazon knowing my handprint (my government has my handprint, Amazon can just ask them if they want), but how incredibly easy it is to just get a print of someone else's palm and charge them for your shopping. Pretty silly to use any biometrics as a primary authenticator rather than as a 2FA option.