Here's' how it works:
You get a gift card for Christmas and put it in a drawer for a few weeks or even months. Eventually, you find it, but by now, you can't remember if you spent some of the money that was on the card. So you're not at all sure how much money is left. You go online and do some searching, which brings up a link to a site promising to give you your gift card balance in just a few clicks.
You surf to the page, enter in your card number and instead of giving you your balance information. (usually you'll get a timeout message, but some are more sophisticated than that), it will send the gift card number to a command and control server so the hackers can steal it. They use it to order goodies for themselves, either to keep or resell.
It's low, but it's an easy scam to pull off, and even relatively unsophisticated criminals can manage it, so expect to see lots of bogus balance checking sites this year.
While Target seems to be the retailer that the scammers are most focused on this year, Bolster has spotted a number of other fake balance checking sites targeting companies like:
Just be aware that the scam exists, and be mindful of where you go on the web when you check your gift card balances.