The contract recieves bets from players. 80% of a bet adds to jackpot and 20% is game creators fee. If a bet is last for more than settings::delay(), the player receives the whole jackpot on the next request to the contract. During the validator switch (after elections) the delay is increased to settings::big_delay() due to the block production lag. The contract auto-withdraws owner fee as soon as it is at least settings::withdraw_at() tons. After the game end, any new bet automatically starts a new game.
Also if the sequential number of the bet is multiple of 10^n, 0 < n < 8, the player receives a mini-reward of 10^{n - 1} tons from the jackpot. In this way, slightly less than 70% of the bet is amortizely reserved for rewards and only 10% truly goes to the jackpot. However, the game may end before the round number of bets and then more than 10% of the total bets amount is paid to the winner.