A cashback website is a type of reward website (often also available on a mobile app) that pays its members a percentage of the money that they spend when they purchase goods and services via its affiliate links.[1][2][3][4]
Leading cashback and similar programs providing U.S. consumers with rewards for shopping online with multiple vendors include Capital One Shopping, Ibotta, Rakuten, PayPal Honey and CouponCabin.[5]
portals
was invoked but never defined (see the help page).