All you have to do is sign up for their Valentine’s Day Gift Contest and then invite your friends to join (via Facebook, Twitter or email). For Every 15 friends you refer, you will receive a $20 Amazon Gift Card (up to a maximum of $400 in gift cards). Contest runs from 1/12/11 through 2/14/11. Gift Cards will be emailed to winners on February 21, 2011.
You will have to confirm your email address when they send you the link.
*Giveaway rewards (gift cards) are limited to 500 (five hunderd). If more than five hundred users are eligible for the prize, itsThougthful.com will randomly draw five hundred winners. If a random drawing is required, every 15 eligible referrals will count as one entry.
Entry link - Click on the Spread the Word tab, top right.