What is the referral credit expiration window?
The referral credit expiration window is the timeframe in which a new visitor [who used their friend's unique referral link] must sign up as a participant in order for their referrer to receive credit.
One additional note is that GrowSurf uses cookies so that people who visit your site using a friend's unique referral link don't have to use that same link when they return to your site. The referral credit expiration window is different from cookies in that that a referrer will be attributed to the new participant, but if the new participant didn't sign up within your set referral credit expiration window then they will have a status of
Credit Expired (and their referrer won't receive credit).