As if you needed any more reason to hate the guy, but this video sums up exactly how his (and other grifters like him) work:
https://www.youtube.com/watch?v=XTBeF-DuPo0
TL;DW - Demands a youtuber(who makes fitness content) to fly out and come on his show (but the youtuber is warned that there's no guarantee he'll get on the show). The youtuber is coached to deliberately fat shame Piers on live TV. So basically, the format here is "tank your career and reputation so that we can get 30 seconds of shock factor TV". I imagine a lot of people take that offer, this guy managed to skirt around it.
CE's Resident Scotsman.
http://i.imgur.com/ILz2ZbV.jpg