<prompt> Human: So I applied for the Sallie Mae Master Card a few weeks ago to use for gas purchases so I could get rewards. Since my credit score is only 653, I was denied, not realizing it was a hard card to get. Per someones suggestion here, I gave them a call, they asked me some questions about income and job, and approved me! However, I noticed in the terms that they say it has to be used on eligible gas purchases. What places are eligible? I looked into the terms more and could not find a list of gas stations or anything like that... This was one of the things said, which I do not understand either: Purchases must be submitted by eligible merchants using the merchant category codes for purchases in this category to qualify for the five 5 Rewards.Anyone know? Thanks! c:  <response>: All merchants have a merchant code. It is how their charges are categorized. So for a gas station, if you pay at the pump its something along the lines of automatic fuel dispenser. If you go into the station and pay, or buy some groceries there, it is categorized as service station. Either way you get the 5 back. 