Invite new friends within Mellow or enter the name of the person who invited you to receive rewards. To activate the referral code, you need to be logged in with social (Google or Apple) and be at least 5 Lv. Citizen level.

You can enter the nickname of one person I recommend, and it cannot be changed.

There's no set limit on how many times others can recommend you, and each recommendation earns both of you 300 Bitrium every round.

The number of people who recommended me can be found within the red rectangle in the image.