Let's Make A Deal What if all of a sudden I gave you 100 coins in a new game just for posting? Then, what if I immediately told you that you can buy a virtual box I have for the 100 coins I just gave you? You eventually make your decision, and if you kept the coins, I'd show you the prize you passed on and tell you its value; you'll either by very happy or very annoyed. If you choose the prize, I almost tell you what it is, but then stop...
Either way, all of a sudden, I say that there's another prize I will offer you if you give up the coins/prize you're currently holding. It could be a golden soda bottle worth thousands, or my favorite leaf collection worth too little to count. What will you choose, the guarantee or the mystery? That's the premise of the show Let's Make A Deal, and I could imitate it pretty well, with my own quirks of course.
In this game there would have to be a line of people waiting for their next chance to try and make the best deal. However, I would try to go quite rapidly through this line so that nobody has to wait too long. Multiple people might participate in a single deal. There would be a variety of different mini-games and concepts each "episode", so you won't see the same thing too often. I may even stick some Deal or No Deal in here somewhere.
At the end of each "episode", the top winners participate in a "Big Deal" where they have the chance to earn a large amount of stuff if they give up all the things they won in the mini-games. High scorers would definitely get a reward of some kind.
Let's see what you think of this idea. By the way, Monty Hall rules. Even I can't think of things as spontaneously as him.