Why would you even need the entire credit card number to sign up for a service likes this? That's what boggles my mind the most. Amex really only need enough data to identify one of their cardholderes in such a way that noone can sign up for someone else.
Name + billing address + four last digits should be enough? Or eight last. Or four last + CVC. Asking for everything that's required for a purchase is beyond dumb. To me, it's like giving out your password while talking to customer representatives, that's also something you don't do.
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Why would you even need the entire credit card number to sign up for a service likes this? That's what boggles my mind the most. Amex really only need enough data to identify one of their cardholderes in such a way that noone can sign up for someone else.
Name + billing address + four last digits should be enough? Or eight last. Or four last + CVC. Asking for everything that's required for a purchase is beyond dumb. To me, it's like giving out your password while talking to customer representatives, that's also something you don't do.