Anyone on the app can refer their golfer friends to the app if they have never played a game on Deemples. If you are an existing user on Deemples who already played games, you won’t be eligible to be referred but you can always refer your other golfer friends (who have not played a game on Deemples) and get rewarded!
P.S. If you signed up on Deemples but have never played a game you can still use your friend’s code to get credits! You’re eligible to be referred as long as you have never played a game on Deemples