I’ve run into multiple issues already with poorly designed forms on sites that claim to accept Amex that freak out when I enter my 15-digit card number, I would love to see the mess that adding longer numbers would cause.
LOL, I guess their payment processor might be able to handle AMEX but they have no idea that some cards can be 15 digits or 19 digits so... Anyway, that seems to be reasonable some how. You guess what, I encountered some POS machines allow only 5(i typed it right, it's 5, not 4, not 6 or 8) digits of pin and unfortunately, my bank requires 6...
