Your analysis is in many ways correct, but you assume that every right wing talk host is faking it. I was just listening to Bob Grant, for example, and have done so for maybe 40 years. he is a radio personality yes but he built his whole schtick on his point of view. I have no doubt he expresses his own deeply felt opinions.
You definitely are correct that the hosts have commercials which are contrary to their beliefs, though a conservative can argue he is all for free market profit making. On thing is true, you won't hear a host knocking his own sponsor, no matter what.
"On Hannity.com we have a bulletin board system where we won't allow it to be overrun with fringe element."Sean, do you have any idea the daunting task it is to monitor over 500,000 members? You might be able to manage your 2-300, but good luck if it grows beyond that.