I have had my users ask this a few times in the past couple months.
Would it be possible to add a referral or invite system to CubePoints. So people get referral points for bringing in new members?
Not sure how to go about coding this just yet. But just throwing the idea out there.
Current member fills out a invite form that pre-populated with a random invite code. After the new member signs up they go to a page where they enter in there invite code to get there referral points.
Just typing out loud :P