A new incentive for Virgin Islanders to head to Pricesmart. The St. Thomas grocery store launched its new Platinum Membership Option with an event at its St. Thomas club Wednesday. With the card, primary Diamond and Business members will earn 2% cashback on the majority of the purchases made by members. The Platinum Diamond Membership or Platinum Business Membership has an annual fee of $75.00. You can sign up at PriceSmart St. Thomas starting October 10th.