Generate referral codes that survive contact with users
Short, unambiguous, collision-checked, and not the username. The alphabet choice is what stops support tickets about codes that do not work.
Referrals
Codes, attribution windows, commission models and filtering out fake referrals.
4 entries
Attribute a referral with a cookie and a window
First touch or last touch, a window that expires, and the check that stops a user referring themselves.
Three referral commission models, and what each one costs
Percentage of earnings, one-off signup bonus, or a share of what you earn from the referral. The arithmetic that decides which one bankrupts you.
Filter out referrals that were never real
Count active referrals, not registered ones. Four queries that separate a genuine promoter from someone with a script.