Systems and methods to accommodate business relationships between a supplier, an original equipment manufacturer (OEM), and an end user. A supplier provides a server having a web site that is accessible by OEM's and end users to purchase subsystems and consumable parts and materials. The OEM's and end users are associated with each other by the server in accordance with established business relationships. The server manages accounts of the OEM's and associated end users to reward on-line credits to the OEM's and the end users when the OEM's and the end users make purchases from the supplier. The rewarding of on-line credits are structured to generate additional business for the supplier from the OEM's and the associated end users.