I attempted to sell a gift card to Cardpool. After several days in review, they declined the transaction. I kept the card, figuring I'd use it eventually. Several months later, I tried to use the card only to find out that it had a zero balance. Customer service for the store told me the money was spent online using the card number and PIN. The card was in my possession the entire time, so the only way it could have been compromised is through Cardpool.