What you should take away from the Rush Limbaugh fracas, other than that aside from the choice of words, he was right.
First, advertisers who initially abandoned Rush Limbaugh are afraid of the left. They are afraid that the party of big government will come at them with all their resources to undermine whatever it is they do. So they cannot be trusted to stand up for free markets or capitalism. Plain and simple. They will never defend freedom of speech or the right of association.