Create referral contests (NOT mandatory for referral links to work)
Make your board invitation only (Optional)
Create and manage contests
Create and manage referral tools: banners, text links
View who referred who
View who invited who
This is a 'simple' referral system.
By simple, I mean it allows users' to specify a referrer and have users' that a user referred listed on a page.
A referral link based on username is displayed in a users' personal details edit page, and a referrer field is present on the registration form...