You can now get 100 points for every friend you refer that also gets 100 points. If you referred a friend, tell them to reply back to this comment with a link to your profile to receive credit. They must have earned at least 100 points and have profiles must have a valid facebook and twitter account, with at least 50 friends or followers to be applicable.
UPDATE: This offer is presently closed! You will no longer receive points for referrals.