When consumers use gift cards to shop, they usually end up spending their own money. According to some researches, those who do use gift cards spend 20 percent more than the value. According to CBS, when using a gift card, customers are more than twice as likely to spend full price for an item. If you're buying from Amazon, and you like the gift cards, then you can take part in this giveaway from dontpayfull, you've got a pretty high chance to get one for free.