I believe it was stated that this show had a winnings cap of $50,000 for the syndicated version, unlike TTD (can somebody confirm this?), so there couldn't have been any Thom McKees (my guess, if this is true, was to prevent ANY accusations of the show being fixed since most of it is based on the slot machines, unlike TTD, which is the questions).
I do believe that the biggest winner on the syndicated version (not counting the tournaments) won about $60,000 (Zach can probably give you the exact figure), which included two cars.
Honestly, though, this show was a lot harder to establish a good run on anyway since so much was dependent on luck (only on this show could you win, say, 10 games in a row and then lose your 11th all because your opponent spun three jokers!), so I couldn't see any McKee-like runs even without a winnings cap.
Anthony