I watched both episodes of last night's Winsanity premiere on GSN. Of course, I already viewed the first episode a month ago. It was a great episode to start out with that had one contestant, who had very good judgement, flowing through the entire episode stacking all ten facts correctly.
In the second episode, the first contestant was replaced not once, but twice, meaning there were three contestants throughout the episode. I noticed that if one contestant does not flow through the entire episode, he/she is not eligible for the car and neither is their random-audience member pair up. The contestant who finished last night's second (9:30pm) episode of Winsanity, who only stacked the tenth fact, did split $10,000 with a random audience member, but neither won a car.
Additionally in the second episode (since we did not see one contestant stack anything incorrectly in the first episode), we see the Winsanity set light up in a fierce red once a contestant stacked a fact incorrectly.
As I said above, being a contestant on Winsanity depends on judgement. If you have good judgement, stacking the facts is not that hard. If you have bad judgement, you are back to your seat in the audience.