Out of curiosity, will that be enough to give your referral the bonus 100 experience? I've never actually used that bonus, but I was under the impression it required €20. Also, is it possible for people to withdraw that amount immediately afterwards (or considering any fees and the €20 minimum for withdrawal, some time after)?
That's one time offer 100 exp for 20 euro.You can withdraw the amount (min 20 euro and game fees 20% go to partner funds) but i prefer a user who would like to continue the game and will invest money.
I suppose that, as people will create a new account, you could invest the €20 so that they could start off with the 100 experience point bonus - it would speed their progress somewhat, I guess. That said, there would probably be no guarantee that they wouldn't simply withdraw the money afterwards.