A jackpot wager pays out only if there is one unique winning ticket. If multiple winners exist, most of the wagered money (70-80%) is distributed among them, and the remainder carries over to the next wager. This continues until a single winner emerges or a mandatory payout occurs, where the carryover is paid out and split among all winners. Rules vary by host track and state regulations.
A jackpot wager usually only pays out if there is only ONE unique winning ticket. If more than one winning ticket exists for a jackpot wager, the majority of the money wagered that day is paid out to winning tickets (usually 70-80%) while the remaining portion is carried over to the next time that wager is offered.
This process repeats until there is only one winning ticket (who wins the money wagered today plus the carryover) or there is a mandatory payout. A mandatory payout means the carryover must be paid out that day-along with any additional monies wagered and split amongst all winning tickets.
Each jackpot wager is governed by the host track's state regulations and may vary. You may wish to refer to the host track's website for additional information.