Duelbits can also take advantage of its emailing services by giving notifications to players about their Twitter code giveaway. If I am not mistaken, other gambling casinos even give free credits and free spins to encourage their inactive players to return. I don't know if Duelbits had tried this kind of promotion in order to entice their inactive player to be active again.
Giving free balance via email to their users, Duelbits did some time ago if I'm not mistaken it was around $5 and I got the email once but unfortunately too late to claim the balance so it's forfeited, just no one really knows for sure if it will be given to accounts that are inactive or still active, because some users receive the free balance even though they are still actively playing on duelbits. However, notifying users by email that they will give a giveaway might not benefit players because sometimes we rarely check email so the giveaway event has been missed. However, Duelbits is always active in sending promotional emails to its users such as slot tournaments or when there is a big match.
With Duelbits getting bigger in this business may be giving free balance is no longer needed to attract their old players who are no longer active, because with the current users they already get big profits, especially since the football club they sponsor this season is performing well in the league so that would raise the value of Duelbits.