From now until 09 October 2019, cardholders of the American Express Platinum Credit Card (including Platinum Reserve) can enjoy 5 Membership Rewards points per S$1.60 spent at Harvey Norman on Monday, Tuesday and Wednesdays. There is no limit to the number of Membership Rewards points that you can earn from this partnership but you should definitely pick one that is located in a shopping mall with a strong membership program to double-dip on promotions.