How Dutch supermarkets stand at the forefront of a global trend Seasoned grocery shoppers are equipped with loyalty cards to save some money, but a recent trend in Dutch supermarkets may have them do the opposite - paying extra. Customers of Albert Heijn and Vomar can opt to pay 10% extra, which the supermarket sets aside on their behalf. Once a certain threshold is reached ( EUR 49 for Albert Heijn ), they can withdraw the money with a 6% interest rate.  “Dutch retailing has