Faustino: Can I take your number? generic proscar tablets While there is a decrease in loyalty card usage, more people are signing up to reward credit cards which give customers cashback on some purchases. Santander’s 123 card is one of the favourites, offering up to 3pc cashback on expenses, with 1pc cashback on supermarket shopping. Users can, for example, earn £12 cashback on a £100 supermarket shop at stores including Tesco, Asda and Sainsbury’s.