Check out this interview where he condones joke theft.
"If you've not got your own, nick a gag! That's what all the top comedians do. People are a little bit afraid. They're afraid of not being funny. People are reserved, particularly in Britain, I think. It's admirable if people go out of their way and don't mind people laughing at them. It doesn't cost you anything to be funny, does it?"
Then look at his twitter feed, he's passing off Milton Jones, Lee Mack, Jimmy Carr, Gary Delaney and Tim Vine jokes off as his own, and when pulled up on it by Simon Evans and Ed Byrne he tried to claim that he writes them himself, despite Gary Delaney, for one proving that one of them was clearly his joke.
He's using stolen jokes to promote his Twitter which is raising his profile and (in)directly promoting something called "Chegger's Bingo", not surprisingly myself and a lot of other comics didn't think this was on.
Unfortunately most people seem to think that jokes materialize from thin air and are "public property" despite being how stand ups earn a living.