Some Konami slots advertise their progressive jackpots as “must win by.” This means they will always pay out before hitting an upper limit. Some slots have two prizes, a bigger one and smaller one. If you see a jackpot that is close to the upper limit, you can choose that slot to boost your chances of winning. There are no guarantees you will trigger the prize before running out of money — so your decision of which game to play should be based on the improved chances of winning it only.