The way the Dunkin cards work is a complete scam. Their "gift cards" are designed in a way that you cannot add the balance to your existing Dunkin account balance, it instead is a completely different part of your account with its own isolated need to "reload" from credit cards. This ensures that customers that receive gift cards are never able to completely use them up and are forced to order as close to but not over the balance less they have to reload it with their credit card and start over