I'm pertaining to the Exclusive $5 Bonus that Duelbits sending monthly to all inactive players. I just recently browse my mail and I'm receiving this same bonus mail monthly since I start being offline last January. I believe you just need to be at level to receive this kind of offer without wagering requirements since it automatically add on your casino balance. If you already have an account and finished the 5$ wager requirements to unlock the first level, I believe you can already received the exclusive bonus email. Just browse your email regularly. The screenshot below is the actual email for the said bonus.
I am not aware of this one, maybe because I played from time to time in Duelbits was this promotion was specifically for inactive players or all players supposed to receive that $5 exclusive bonus? If it is for inactive players I think it is smart that they offer that to encourage again the players to play in their website.
ya.ya.yo!