Well, on a very small scale, under certain assumptions, extending credit in this manner might be a net win for the business. Legal casinos offer credit backed by their ability to collect through normal channels. Even offshore/illegal, if the amounts forwarded are small, and the users have shown a propensity to zero their debts after a while in order to deposit new funds without 'burning' their whole account/name, it could make sense here, too. (I didn't notice substantiation of the magnitude of these 'phantom balances'.)

But atop the other allegations, and depending on the magnitude, it seems fishy... like a desperate move to give the insiders a bit more time to withdraw remaining funds or 'gamble for resurrection'.