Amex cashback card is a useful service that you can use for payments and you get 420kr gift if you sign up using a reference code.The cashback option works in the collection of payments on a year basis and it gives you 1.25% back on the total amount.If you want to try it, use mOHAmIxnK3Note: Amex is not supported by many merchants, but the major retail stores accept it, ex: Willys, ICA, Coop, Lidl