Thunder Valley has eight "100% payback" slots, which means that at the end of their life, they should have given out the same amount of money they took in. This group had some interesting features, the first was a bright sign on top, advertising "win up to 100% payback". What? What kind of deal is that? It sounds like the worst of both worlds, like you had no chance of going away a winner. I figured the sign was just not worded very well, that they wanted to say "100% payback", but that a sign which said that sounds like you are always going to win your money back.
The second feature was a small placard which stated "This game is not eligible for the Thunder Slot Fortune Bonus".
Ah ha! Maybe I'm a sucker, but to me, this sign says "the casino makes so little money on this machine, we can't let you have any other perks for sitting here". BINGO. This was the machine for me!
Try to guess how much he won with his $1,000 credit. Link