Prepaid credit card discount

Hello, I realize a project Web site for knowledge management in the areas of sustainable development and environmental protection. This Web site is intended for grouping peoples concerned with various issues that it raises! For the payment of the fees of the administrattion to this website, we expect the following way: each member would use a prepaid credit card that gives discounts on their everyday purchases. EACH MEMBER OF THIS GROUP WOULD ASK TO THE CARD ISSUER TO REASSIGN TO THEIR ORGANIZATION THEIR DISCOUNT. My question is how to proceed with an issuer of prepaid credit cards to do that? JR masse