Only one hope here, it is not seeing other complaints from users who get banned or excluded from their promotions because the users make profit regularly from the tournaments.
Most probably, we will see similar steps from them if the new users also manage to maintain profit through the tournament prizes. Duelbits team hasn't changed the rules of the tournaments yet. I believe they will bring changes in the tournament rules if similar thing happens again. Let's wait and see.
You seem to be sure of what is going to happen, and I can't blame you for that, some antecedents and patterns will always be key factors for certain predictions.
However, it's better to change their Ts&Cs if it's causing much trouble in paying big winnings. If the Ts&Cs are stringent enough and they can reduce the winnings to afford them to pay, why not?
The worst part of this is in all of our cases, we were banned a few hours or basically right before the tournaments ended or before a big bonus dropped (the monthly). They decided to change the status on our accounts after we have spent and lost money competing in their tournaments. This means going forward even if a really good promotion opens up, it cannot be trusted because we could be spending thousands chasing it only to get our placing taken away at the very last minute. If Duelbits did the right thing and paid out the current tournaments with the already established rules before changing them, then yes they can be trusted, and maybe Bitinity can open his account again, but unfortunately this is not the case here.