This is what the Help page has to say about it:
"By referring friends, neighbors, or others to the site, you earn points! Referrals can be acquired by visiting either the Link-to-Us page or by copying and pasting the link given in your profile settings. Referral points are only rewarded after the user clicks the link and signs up for an account. Any abuse found in creating multiple accounts to earn points will result in a ban from the website."
Please look here for answers to further questions about the site. It has lots of good info!
