This one is TOTALLY worth it!! Their stuff is cheap, you can easily end up getting something free after using your $10 credit.
Here's another website much like Guilt Group and Rue La La. They sell great stuff at discounted prices and when you sign up you get an automatic $10 gift credit. Once you sign up, make sure you write down the coupon code. Then go to your profile, redeem gift card, and enter that code. It should be P1070, but I'm not 100% sure if that's the only code they give.