Well technically speaking Egoraptor, Jontron, Dan , And Ross. Have their own things, its just that two animators aren't animating much anymore. However Egoraptor still does other stuff jon got back to his thing , Dan is a comedian musician and ross is a professional " my significant other gets on reaity tv " person. Not to mention barry's other video game related ventures, that has been documented. And who knows what the hell Keven does.
Everyone has their own thing.Why would you do one thing? that's setting yourself up for failure if that youtube thing ever blows over. Its like those people who cover one game and then that community dies and then their channel dies. Diversify your bonds
A lot of higher up Game guys do other stuff now. Jessie cox is regularly on geek and sundry and nerdist stuff, total biscuit is a commentator and heads e sports teams. Dodger is a sort of news and entertainment personality. Matt of the super best friends has started to do movie stuff on the channel, mark gets to be mark in places for a living. You do that thing to expand into other areas, you don't want to be known for one thing.
And on the flip side a lot of non video game dudes have been getting into games. Diversify.