The only way for Betnomi's admins to prove their trustworthiness and save their reputation is to pay ALL their users back ALL their money first, BUT it's also not a guarantee that they'll be trusted by the entire community again. Because if I had my money locked for months in a centralized service and the money was given back to me, I would never use any service owned or operated by those people again. One period of mental/emotional stress with them is enough.
For the sake that have been in trouble with their funds as they have became trusted by these users. They will just have to accept whatever is going to be the feedback of these people, whether they will say that they will still be trusted then that is good on their part.
But if these people after receiving their moneyback starts to say that they are not recommended and will never be back and gamble there again. They just have to accept any words from them and there is nothing they can do but to be in good faith and just return all of the pendings, either big or small amounts. As they have said, anyone who is eligible for that shall do.
I think what is most important at this point is not wether the betnomi team gain the trust of the community of not because their have already been down and at some point they announce that they are going to have domain name changes, which means the Betnomi we used to know is now scam and should remain like that.
But if the same team can make refunds as promised, it then becomes another challenge for them to win the trust of the community and how they can do that, is through adequate improvement and commitment to the promises.
I am just coming across this thread actually and personally, I see or sense sincerity in the op, Betnomi before now was a very trusted casino, one that is one of the most reputable actually, I personally at the time believed something did happen or went wrong internally which resulted to their issues with withdrawals and so on.
And reading the detailed explanation from the op did confirmed my assumptions to be true, and if I am asked, I would say they Betnomi will surely gain its good reputation back, if like you said, they can keep to their word by paying back everyone who was financially affected by their issues.
But based on what op said, they probably may not have plans of continuing with the Betnomi brand, he said they are going to use their experience to build a better and stronger casino, let's keep our fingers crossed.