However it has become more frequent for the card to be used as a preferred deposit method for online gamblers. Until recently, this charge card was primarily used as an upscale business or professional charge account. Due to their alliance with MasterCard, cardholders may also use their cards on the MasterCard network. There are more than 8 million cardholders tied to this credit card brand, and it is accepted at more than 6 million merchants across their network, including Diner's Club casinos. The parameters concerning the payment terms of this card set it apart from other major credit card deposit methods. This brand is often lumped in with all the credit card deposit method descriptions however it differs from other credit cards in that typically your card balance must be paid off monthly, rather than having an existing revolving balance that is pushed forward each month as with traditional credit cards. Founded in 1949, the Diner’s Club International card is the first and oldest charge card in existence.