Can I pay for a domain by credit card?
Although we do accept credit cards for membership fees and other services, we cannot accept credit cards for domain name purchases. The reason for this policy is that credit card payments can be reversed by the payer long after the exchange has already sent net funds to the seller. Because our service guarantees payments to sellers, we cannot accept payments from buyers that can be too easily reversed.
If they are talking chargebacks then thats a poor excuse,
