instaGC.com was created in February 2011 and is the top rewards site that offers instant gift cards to its members. Over 100 different options are available (example of a few -> Amazon, eBay, League of Legends, Pizza Hut, Target, Walmart) that you can redeem your points for. Tons of easy offers available with new ones added daily. There are daily, weekly, and monthly offer and referral contests as well.
InstaGC is by far one of the simplest and fastest ways to make money online that I've found in the many years I've been doing this. What makes them one of the best is that they pay their giftcards instantly. You get the code on your screen immediately after you hit "redeem" - no waiting around like there is with other sites.
What makes them even more exciting at the moment is that they have a holiday bonus scheme under which you get a bonus number of points based on how many offers you've completed, up to 10% extra on what you earn until the 31st of December!