In my opinion, it's hard to tell whether the behavior of dadice is actually shady (ie, indicative of someone about to do a runner) or merely reflective of someone who feels like they're being pushed around. That is, out of nowhere, all sorts of folks started demanding all sorts of proof about their bankroll. At first, several competitors of dadice were the ones offering to "privately" verify the bankroll. It seems to me that a perfectly legitimate interpretation is that dadice felt pushed around, decided to stand up for their rights not to reveal their private information, and to stand on their budding reputation as a legit site.
The other situation has also been clearly expressed by the detractors in this thread, ie, they won't prove their bankroll because they can't. I'm in the camp which believes that the best thing to do here now is to let everyone's head-of-steam cool down for a while and see what happens.
I agree, it is impossible to tell the motivation behind refusing to show proof of solvency. But that action alone destroys the site's reputation. "We don't want to prove out solvency because people are asking us to" isn't a valid reason. Now, I agree, if I was in their shoes, I probably wouldn't show a competitor my addresses (although why that would matter I don't know) but there are hundreds of trustworthy people in the community they could show. Why aren't they doing that? Nobody knows. But seeing as there is no good reason to not (especially since, you know, they claim on their site that they will) the only explanations left are shady ones.
We don't need to wait and see what happens. That's how people lose money. We already know what happened. They were asked to prove their solvency and didn't. Is it because they couldn't? Is it because they didn't want to? It doesn't matter. All that matters now is that they have to be assumed as insolvent by any reasonable person.