The sample scene from GitHub for referral recipe is missing scripts.
My project has a working playfab SDK installed and I am already using it for authentication and login.
But when I tried adding the referral recipe package, all the scripts were missing inside the sample scene except for the ReferralCodeDemo.cs.
Anyway, what I am actually looking for is how to set up a referral system. So maybe this script is enough to understand what is actually needed.