"A casinos bank roll is a complicated formula taking into account, chips, number of slots, number of tables, progressive jackpots, keno limit, sports book limits, etc, etc."

It's not that complicated when you look at the total picture. If you don't have enough cash to pay off the largest win that isn't a linked slot win, you don't take the bet, and you don't issue large numbers of collectible chips hoping that they'll never come back to the cage! ...it wouldn't surprise me if some casinos carry some form of annuity insurance for Keno, but other than that, if you can't pay, you can't be open for biz!

Bob