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 monthy offer and referral contests as well.
I've been using this site for a few weeks now and it's actually pretty easy and fun. You can cash out at low amounts, and there are plenty of daily offers to come back for. Definitely one of the best sites for making easy money online hat I've come across.