Possibly the "Major" jackpot on those "Link" machines. In general, the Mini, Minor, Major, and Grande jackpots change with the coin bet, as in the 1c, 2c, 5c, 10c, $1, and $2 selected. I've seen the Major reach $1000 and stay there for a long time before it is hit. At some point it will hit, of course. We watched (and played) one for two days. It was hit by somebody the morning we were leaving. And BTW that particular game is not featured in 'the book'.
That's just my experience, not from anything in the book. I'm sure I'll learn more if I ever go back to the book. It got a little 'tedious' for me and how I want to spend my time playing.
Candy