What are the odds of winning the jackpot on the Wheel of Fortune machines?

Are you referring to the progressive jackpot or other jackpots? The WOF has made more millionaires than any other slot machine in history. But like any investment, past performance is no guarantee of future earnings. I have played all of the WOF versions, up to and including the $100/play, and it is a wildly volatile machine and very profitable for the casino. For example, a $1 two-coin Double Diamond WOF pays its wins with a one coin schedule; the second coin is a side bet for the SPIN and jackpot. Consider that current-version RNG chips can do 4000 combinations in a half-second, and only 1 combination comes up WHEEL-WHEEL-WHEEL, the chances are minuscule that the progressive will come up.