I personally think his leaving was either set-up or he was tired of being on the show, this guy has so much knowledge and is so smart but then screws up by answering a question about what companies employees only work 4 months of the year? He answered Federal Express, c'mon, everyone knows FedEx works year-round.
I don't watch the show but when they showed the question that beat him on the news I was like "Oh please."
I agree with you! Not too mention he would certainly think that FedEx has more than 40,000 employees, just based on the fact that it is a World Wide company.
Also if you took into consideration the amount of his final wager, it seemed to me to be a uncommon amount for him.