i signed up this program a while ago and I have already made $50/month without referals! You get $10 in your account to sign up. They send you e-mails based on your interest (choose them all for the highest earning potential, you get paid $.05 per e-mail but trust me they send a lot!) i use a spam account at yahoo so it doesn't interfere with my regular mail.
http://www.dollars4mail.com/id=ABC-123/