An E-commerce merchant account will add credibility, liquidity and viability to your business. Accepting all credit cards including VISA, MasterCard, American Express and Discover Card will allow the merchant to accept all forms of plastic. You never turn away a sale. The rule is: You always accommodate the purchaser and they will use you and refer you forever. Discover Card for instance is one of those cards that merchants forget. Yet, because of the importance of the card, you now receive the benefits of accepting it without any monthly charge. Card holders love using their card because they get a significant rebate percentage back. It adds up to accept Discover.