Kos has refused to donate to Obama's campaign because of Obama's recent actions:
...there is a line between "moving to the center" and stabbing your allies in the back out of fear of being criticized. And, of late, he's been doing a lot of unnecessary stabbing, betraying his claims of being a new kind of politician. Not that I ever bought it, but Obama is now clearly not looking much different than every other Democratic politician who has ever turned his or her back on the base in order to prove centrist bona fides. That's not an indictment, just an observation...Ultimately, he's currently saying that he doesn't need people like me to win this thing, and he's right. He doesn't. If they've got polling or whatnot that says that this is his best path to victory, so much the better. I want him to win big. But when the Obama campaign makes those calculations, they have to realize that they're going to necessarily lose some intensity of support. It's not all upside. And for me, that is reflected in a lack of interest in making that contribution.
Did Kos really want Obama to run as the MoveOn candidate? He never has been.