Take a look at their privacy policy...
<< Registration is required on YourFreePresent.com. This Privacy Policy also applies to visitors to our Web page that have agreed to receive e-mail marketing from YourFreePresent.com and SilverCarrot. The personal profile information you submit to YourFreePresent remains your property, but by submitting that information to YourFreePresent.com you grant YourFreePresent, Tendollars.com and SilverCarrot the right to use that information for marketing purposes. We may sell our e-mail lists, and we may join together with other businesses to bring selected retail opportunities to our members. >>
So by signing up for the stuff, you're committing to a lifetime of spam and junk mail...