There are generally two reasons. One is to check your distribution level in a certain order to determine which level of your customers have purchased the goods, which will directly affect your commission rate; the other is that the platform calculates the commission based on the amount actually paid by the customer. Although a certain product is priced at $100, but after deducting vouchers and other promotions, the customer only paid $80, so the price for calculating the commission is based on $80.
