To be honest, it doesn't seem like they really WERE happy if they are so easily convinced by an exterior network's offerings.
I used to be a partner at Fullscreen, and if another network approached me with ANY deals, I would always say I'm sticking to Fullscreen because of the stability of knowing exactly on an "I've-seen-it"-basis level what they offer. Any partner of a network should be proud to be signed to the network and had they really been happy, they wouldn't have gone out of their way to tell you that they are annoyed.
Sure, what Freedom! offers as a no lock-in has two sides; on one hand you can leave whenever you want (which is something people might want to do in the future considering YouTube's quite sweeping, sudden changes sometimes), but it also leaves the question open of why they would want to leave. My point is that every argument has two sides to it and technically we could debate over whether or not one network is truly "better" than the other but truth is it will always be up to the individual content creator to decide.
Back on topic of our thoughts pertaining the actual ACTION taken by George S. (not the content of his action flaming on a different network):
I feel like he didn't have to make it sound the way he did. Accusing Vanous of being "creepy", appealing to a crowd of "10 year olds", really doesn't make you look like the tougher man. George S. should know that Fullscreen IS the bigger company here (that's just a fact), and if they do indeed offer better things, then maybe their support team would be more helpful (rather than focusing on adsales). What Freedom does is not exactly the opposite, but it is EXTREMELY community-driven on a partner-help-partner basis with loads of interactivity between partners involved. I feel like most people who have complained to Fullscreen have actually complained about the support team (or lack thereof) and their replies to the messages and NOT about their RevShare, or the other benefits that Fullscreen offers.
Just to be clear, my position on this IS slightly biased, as I am Head of Designs at Freedom!, but I tried to make this nice and easy. The only reason I actually AM involved in Freedom! is simply because of their forums and their openness to reward people on the forums according to how much they helped (I personally opened a design request thread, which attracted loads of attention). As said: I do not vouch FOR one or the other; I just think it's wrong to hate on the guy making the update videos and actually taking time to inform his partners personally rather than having two guys do a Twitter QA live session with stuff you can find on the F.A.Q. anyway.
Again, I'm NOT a representative of Freedom!, these views ARE solely mine, I simply post on their forums as a designer (and I would do the same at Fullscreen if they would have open forums) and have no financial or personal benefit binding to them.
P.S. Sorry for slightly confusing answers, I hope it's still somewhat understandable.