I've had my mastercard linked to my account for a long time. Today I tried to pay a bill to National Geographic Magazine, and I got this message: "You may not use MasterCard, Elo, Hiper or HiperCard to fund this payment. Please add a different type of card or use a bank account." Why can't I use MasterCard? I'm not going to go through the pain to add another credit card to my acct, and I'm not linking my bank account. (country: US)
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