Yes, all members can increase their credit line if they prove that they can handle it. The company doesn’t specify how big the credit line can be for a single user, but they say that it’s possible for users to ask for an increase every three months. The company uses three-month intervals to evaluate the reliability of cardholders and learn what their shopping habits are. If they show that they can make payments on time and that they want to shop even more often, their credit lines will be increased. Simply put, after using your card for three months, contact customer support at 1-800-251-6144, and see if they are willing to give you an increase in your credit line.