形近字是rebate，中文意思是v. 退还（部分付款）扣除在（木块）上开槽口用槽口衔接（木块），n. 退还款折扣（木块的）槽口返还部分

Sometimes the registration tracking to AA can be overwritten if you click to another affiliate， though I've always received both the rebate and the miles.