We just installed a referral system for ClubCrosstrek. If you go to Profile > Summary at the top of the page, you can view your Referral Link. Send this link on to as many people as you wish via email, Facebook, Twitter, etc., and anyone that signs up through your link will be considered your referral. You will see your referral count both on your profile page as well as under your username on forum posts.
Right now the program will just be used as a way to help promote the forum and get new members. However, soon we are hoping to run a contest using the new system where the more referrals you have, the higher a chance of winning.
Let us know if you have any issues or questions!