Paypall won't accept payments for no reason. Paypall is very touchy-feely /fastidious regarding any visa or master card payment without any reason. Many people avoiding paying trough the paypal. Why? Because Paypall will make their problems - your problem: "The card you entered cannot be used for this payment. Please enter a different credit or debit card number." Guess what - merchants are loosing money because of that. Paypall just don't care as usual.