Yesterday, Brian White blogged about unused gift cards. Millions of people receive gift cards during the holidays, and many of these cards end up sitting in purses, pockets and desk drawers, unspent. This represents an enormous profit for retailers, who keep the payments for the cards without having to part with any merchandise. What an easy way to make money!

According to a recent AP report, Best Buy (NYSE:BBY) claimed $43 million in profit from gift cards sold but not used in two years or more. Limited Brands (NYSE:LTD), the owner of Victoria's Secret, claimed $30 million.

Gift cards are very popular. The National Retail Federation estimates that retailers will sell over $25 billion in cards this year. Somewhere between 5 and 25 percent of the cards will not be used. Interestingly, rates of use vary according to the kind of store the gift card is from. Cards for basics, such as food, get used quickly and in full. Less essential needs such as entertainment have higher rates of disuse.

I hate the idea of just giving money to retailers -- although I know there are a few gift cards in my desk drawer. So let's all make a vow to use those gift cards that come in this year. Make the stores earn their money!