In the future, would it be beneficial for operators to also expose how much they have holding in player balances that are not invested?
At JD it was never really an issue. We had one guy who kept a couple of hundred coins in his balance, and all the rest put together maybe came to another hundred. Compared to the size of the bankroll it was less than 1%.
I guess it would make sense to agree to list all player balances greater than a certain amount (like 0.1% of the bank?) each time you do your proof of solvency.