Yup, the highest I got was 40k in about 20 games. Not even half way there. I did learn that the Hold Bonus does 2 things. 1. It carries the bonus over to the next ball. 2. If you achieve the Hold Bonus on your last ball, you get all the total of all the Hold Bonuses from the game. I knew about 2 but not 1.
To increase the Jackpot jackpot? Only way to do that is hit the 1-2-3 rollovers as many time as you can.
To increase the bonus? Seems like my best bet is riding the Comet over and over. I tried to shoot the ducks a bunch, but got way to many fast outlane drains. I guess a good strategy might be to achieve the Hold Bonus on as many balls as you can, that way it carries over. At any rate, 99K is probably beyond my skill level.