When Roger Simon announced he was leaving as CEO, I just figured it was yet another figure who decided our dance with destiny can't be stopped or mitigated, and said screw it. Now I know he is continuing to contribute as a writer, so maybe I'm just overly cynical, but that's sort of my take just based on my own attitude following Big Turd's reelection.
I have a similar view of Jim DeMint resigning from the Senate. It is tantamount to admitting that nothing can be accomplished in the so-called halls of power, and that he'd have better luck trying to spread a message through a private organization.