Can stamps and deals be used in conjunction? NTUC Link It depends on the terms & conditions of each deal or stamp card, set by the merchant. Related articles Can I earn and redeem LinkPoints at stores using the Plus! App? Can I hold multiple Plus! cards? How do I know if I am holding an in-store issued Plus! card? The mobile app is not responding - who should I contact? What should I do if the merchant did not issue a stamp upon payment?