I am launching a book in April and want to copy what this company did: [url removed, login to view]
It contains 2 pages
1) Users enter their email address on splash page and used as an identifier for tracking purposes.
2) The referral mechanics live here. It contains a shareable link to the splash page via email, FaceBook & Twitter share buttons with a click of the mouse. The more friends who sign up using your unique referral link, the bigger the prize you earn.
The website that I want created is in word press. I understand that the referral program is created through Ruby on Rails.