Good old zilch.
I just got rid of all games off the computer, and you re-introduce one. I realised the amount of time that we can waste by switching our brains off. Surprising those that can't figure probability soon tire of the game. Which is why there is a portion of the community that says that you never win at gambling. And those that do win say that they are not gambling. Which leave the other group (thankfully) believe that they can win at gambling.