You can offer cashback from your affiliate commission, but you need to check the terms of your affiliate program first. Some programs allow you to offer cashback to your customers. Others may have restrictions on such offers. You should always follow the rules set by the affiliate network or company. Offering cashback can attract more customers and increase sales. However, you must ensure that the cashback does not affect your profit margins. You should calculate your costs before making such an offer. Always be transparent with your customers about the cashback terms to avoid any confusion.