There are several different types of affiliate commissions, such as pay-per-sale, pay-per-click, and pay-per-lead. Pay-per-sale commissions are when an affiliate is paid a percentage of each sale that results from their marketing efforts. Pay-per-click commissions are when an affiliate is paid a certain amount for each click that is generated from their marketing efforts. Pay-per-lead commissions are when an affiliate is paid a certain amount for each lead that is generated from their marketing efforts.