There's a twist in this example though. He says he's going to steal (but split after the show) and convinces the other guy to split. At the last minute he changes to split so that the split is governed by the rules of the game.
I think that's why the guy proposing the deal ended up splitting. If the other guy did steal to spite him, the fact he split would show that he was acting in good faith and would increase the chance of a split after the show.
