When you become a reseller, you will be given access to a control panel where you will have the ability to create accounts for all your customers. The credits you purchase will be available in your control panel, credits do not expire while they are in your control panel. When the credits are issued to your end user (customer), that's when the credits become active and expire after 30 days. If your customers stay active this will become a residual income for you month after month.
Choose the credits you wish to buy and become a reseller.