Thanks for inquiring. When we launched the referral program we offered two forms of payout, credits and Paypal. After a year of running the referral program we had collected a lot of metrics.
80% of customers chose credits as their preferred method of payout while only 20% chose Paypal. In addition we were reviewing the number of abusive referral accounts and saw that the large majority of them were from people that selected Paypal.
Given the lower selection of Paypal as a payout method and the much higher incidence of fraud we unfortunately made the decision to remove that as a form of payout for customers who had not yet started using the referral program.
All prior customers will continue to have their payout in the method that they selected.