Your friends must solely register using your uniquely generated link and if you referred them by their emails, they will need to sign up using the same exact email address.
The bonus will only be credited into your account when your friends’ cashback from their minimum spend of AUD20 is confirmed. Confirmed cashback will exclude any canceled, exchanged or refunded purchases as these will eventually lead to cashback being rejected.
(Purchase from Uber, Uber Eats, Kayo Sports, DoorDash, Accor Hotels, Intercontinental Hotels Group, Woolworths Gift Cards, Circles.Life. are eliminated from the minimum spend requirement)
You can also visit here for more details.