They have the right to exclude any user to use there Casino if they feel you are abusing sthere promotion. You can read again there ToS to verify this. No one here will support to your claim when the issue we are are arguing is stated on there ToS. Simply the casino don't get any profit on you since you are just using the Casino for the promotion purposes only. You can try other Casino and move on. Duelbits is not scamming you nor taking advantage with you. Simply they just feel that your activity isn’t profitable to there business.
Some people will never understand that just because we are finding one side right, doesn't mean that we are not shills of that side. I mean Duelbits is great and all but if I see them do something wrong one day, then I will be the first one to say that they are doing something wrong.
However, if I believe that they are doing the right thing then I would not be against them just so people wouldn't call me a shill. If they want to exclude someone from the giveaways and promotions and everything else then they will be able to do that and it would be normal, I would not guess that it would be something illegal to exclude some people from those things.