There is no unresolved accusation !
And would appreciate it if you'd actually take a look through the posts of this thread and the one you linked and not base your response off a thread title.
I went through the thread and this is what the casino responded and mark the case as resolved.
https://bitcointalk.org/index.php?topic=1676313.msg20368185#msg203681851. we've disabled deposit bonuses and currently working on a new algorithm based on your feedback and a new detailed and clear bonus policy.
2. we've refunded the initial deposit to Ozafejyw782 (it's already on a balance). There were people mentioning that we should revert the balance to the moment before cancellation and this would be the easiest and acceptable solution for everyone, however (unfortunately) this is not technically possible, we just don't have this possibility.
So we believe now this issue has been resolved. So all they did is refunded the deposited amount not the amount actually won by user and the casino made changes to their policies after when someone won a big amount, maybe its not shady for you but IMO its shady and I won't trust a casino with such kind of resolution in case of an accusation.
So in your opinion, improving the regulations is shady behavior? After all, it's all about developing and improving services. (Besides, this happened a few years ago.)
As for unresolved cases, could you give some examples? Because I have the impression that you are throwing words here that are not covered by facts.