It's a good idea, and one that I've run during the closed beta. A handful of the users have a referral credit for referring other beta users, and once we leave

It's a good idea, and one that I've run during the closed beta. A handful of the users have a referral credit for referring other beta users, and once we leave the closed beta, their credit will go into effect. I plan on extending the referral program after the launch as well.