I like when game shows award an extra bonus for excellent play -- more specifically, when a contestant sweeps a match.
One show comes to mind:
Celebrity Whew! When episodes became self-contained and one team swept the best 2 out if 3 match, they got to play a 3rd round against the house for a chance to earn a couple of hundred dollars more, but more importantly, more time running the Gauntlet.
Go also had a extra bonus round vs the house for a swept match, but that was always part of the game and not added mid-stream.