I found this burried in patent application...
This might leave you with more questions than answers, but it's some good information:
[0089] Wheel of Madness Random Incrementing Jackpot
[0090] The Wheel of Madness is an example of a random incrementing jackpot for card games such as blackjack. The Wheel of Madness begins by players wishing to participate in the jackpot component of the card game each placing a side wager. A hand or round of the card game is played. If one or more of the players participating in the jackpot component receive a predetermined combination of playing cards, those winning players qualify for the random incrementing jackpot. Each winning player pushes a jackpot button that spins a prize wheel that randomly stops on any one of five fixed jackpots or one incrementing jackpot. The winning players win the jackpot on which the prize wheel stops. If more than one winning player wins the incrementing jackpot, they split the jackpot between themselves.
[0091] Jackpot Amounts and Probabilities of Winning Wheel of Madness
[0092] The six jackpots are as shown in the following chart. The five fixed jackpots range from $10.00 up to $50.00. There is a 1 in 1,875 chance of winning the incrementing jackpot on each spin of the prize wheel. 1
Table contents not available. Please see the table in the original document. The original document or individual tables may be available via links from this document.
[0093] Specifications for Wheel of Madness
[0094] The specifications for the Wheel of Madness are shown in the following chart. The incrementing jackpot ranges from a minimum jackpot of $100.00 to a maximum jackpot of $10,000.00. The meter increments the jackpot $1. 00 every 15 seconds. When the incrementing reaches the maximum jackpot of $10,000.00, it starts over at the minimum jackpot of $100.00. The total cycle time for incrementing from the minimum jackpot of $100.00 to the maximum jackpot of $10,000.00 is 21.04 hours. The average pay is $5,050. 00. The total cycle time coincides with the typical amount of time which casinos are open, being closed for cleaning about 3 hours per day. Therefore, the meter resets to the minimum jackpot each day. 2
Table contents not available. Please see the table in the original document. The original document or individual tables may be available via links from this document.
[0095] Hold % for Wheel of Madness
[0096] The jackpot Hold % is shown in the following chart. The overall Hold % for the jackpots is greatly influence by the amount of the jackpot which is won. The range of the incrementing jackpot can be changed to increase and decrease the minimum and maximum jackpots. Since the side wager is an optional bet, the Hold % from the bonus jackpots will add only about 2% to 4% to the hold % on the primary game such as the card game blackjack. 3