CoolMoo5
I Love YTtalk
Yeah it makes sense the team is not employed by the network. But maybe, if you have millions of subscribers (Pewdiepie,smosh,Jenna Marbles, etc.) the ad sales team really does get you more ads. I don't think joining a network with an ad sales team would get someone like me (80 subs, 30,000 views) any more ads or more money. But if the really big people on YouTube with networks I would imagine have a 90/10 split or maybe higher, so for them it might be worth it.