The best way to use this trick is on a puzzle sideshow that has a low play cost. While somebody is playing, up the play cost to $10,000. Make sure that you hit the confirm check to get that price activated. When they finish the puzzle you will get the $10,000 instead of the lower play cost they started playing at. Nobody will play at $10,000, so lower the price back down to a fair price afterwards. You can do this as often as desired. Puzzle sideshow works best because it gives you time to raise the price while the customer is playing.
Start a small park with four puzzle games close together, two rides, one food, one bathroom and a gate price of $0. If you set it up so all four puzzle games are within view of each other, you can do the global price raise/lower for all puzzles while all four are active (making $40,000 at once). The $0 gate price will get the visitors in fast. Set the prizes value to $10 and a maximum win possibility. That makes the visitors happy, stay longer, and play more.