Referral Rewards
For personal sharing with people you know. Use this if you want to invite friends, family, clients, customers, business contacts, or people you already have a relationship with.
Affiliate Program
For public, commercial, paid, or higher-volume marketing. Use this if you want to promote Zurzag through a website, newsletter, YouTube channel, podcast, paid ads, social media campaign, event, agency campaign, or other marketing channel.
Simple difference
Referral Rewards = people you know.
Affiliate Program = audiences you market to.
Use Referral Rewards when the relationship comes first. Use the Affiliate Program when the marketing channel comes first.