Double Prices.
Seriously, it's the least taxing "game" on TPIR. "Is it $x or $y?" I pity anyone who gets called onstage to play that. At least with Switch?, there's some degree of something happening when the models show the prices and/or move them from one prop to the other.
I'd also say 10 Chances, because it takes way too freaking long and nobody seems to know how to play it. When's the last time someone won this? 2004? </hyperbole>