There are plenty of companies that would want to advertise on the Beck show and if recent history is any indication, the losing of advertisers did not seem to hurt David Letterman.
David Letterman was one advertiser and it was consumer-driven, this is up to twelve advertisers and is being driven by the WH, HUGE difference, with much different ramifications on our freedoms, either we fight this or we have lost all semblence of free speech in this country.