Previously, when a new account logged into the app to receive a 500 cash verification reward, it would enter the nickname of another account; thus, both the new and the referred account would receive 500 cash each.
Update
From today until the last day of February of this year 2021, new accounts to receive rewards mustEnter the nickname or invitation code.
As of April 1, 2021, new accounts can ONLY enter the invitation code
→ #e62d7c3c
To find your account invitation/referral code...
