The rules of this gamble can be a bit problematic for Kakerou. The wager for this gamble is 50mil, meaning whoever wins, gets the 50mil and Kakerou is obligated to ensure it. The winning condition is "whoever enters the password first, wins."
However, what if someone, definitely not named Usogui would enter the correct password and tell it to the opponent without changing it. Since he is the winner, Kakerou would be obligated to make sure he gets it. However, there is another way of looking at it: Immediately after winning the game, the winner gave the 50mil to his opponent.
Now why would the winner do such a thing? In this gamble, there are two referees. Let's say someone, definitely not named Usogui, knows the personalities and judging style of those referees and has an interest of causing a dispute between them, so in the end, there is only one referee present. If only there was a rule within Kakerou that would make it possible. And if only such a rule would then make his referee #0, that would be great.