Advertising Hypocrites

Rush Limbaugh has lost seven sponsors since the slut flap. One of these is Carbonite. This company also sponsors The Ed Show(Ed Schultz) on MSNBC. Why is it that Carbonite didn't drop him as a sponsor when he referred to Laura Ingraham as a slut? Is there a double standard? Would it have anything to do with the owners of Carbonite being Obama donors? Is Rush being made a scapegoat in order to pursue a political agenda? Is the Left a bunch of flaming scumbags? I think I've answered my own questions.