Can stamps and deals be used in conjunction? NTUC Link July 12, 2019 02:48 Updated It depends on the terms & conditions of each deal or stamp card, set by the merchant. Related articles How do I apply for a Plus! card to become a Plus! member? What should I do if the deals I have collected are not reflected in "My Rewards"? What is the Plus! app about? How does the app get updated? How do I provide feedback and suggestions to improve the app?