Gaiam $500 Gift Card Monthly Giveaway

http://life.gaiam.com/gaiam/ecs/main/newsLetterSignup.html
PRIZES. Subject to the terms and conditions of these Official Rules, five (5) Prizes (one each calendar month during the Entry Period) will be awarded in this Sweepstakes. Each Prize includes and is limited to a Gaiam.com gift certificate in the amount of $500, which may be used only on Gaiam.com. The approximate retail value of each Monthly Prize is $500, and the combined approximate retail value of all Prizes is $1,500.