sumobi/edd-checkout-referrals — pull request #1 by pippinsplugins (2014-04-23 13:20:22+00:00)
Title: Simplify the already referred check

This simplifies the function by using AffiliateWP's was_referred() method of the tracking class. Aside from being simpler, this will also ensure better future compatibility if we modify how the tracking is done.