He still had an audience that is about the size of CNNs total primetime audience. Your opinion of him his completely irrelevant. He has millions of people who listen to him and probably almost as many who hate him for what he says and want him off the air. Those are the people who got him fired not the people who watch. If you work to get someone silenced because you don't like his message that is censorship.
No they won't all become democrats but that doesn't change the tingles the left gets for getting kicked off the air.
The only reason he isn't the rainmaker is people who don't watch his shows threatened his sponsors. Alec Baldwin is on tape calling his daughter a stupid pig and he is selling how many things on TV? This has nothing to do with what Bill did and everything about who he is. You can argue that it is justified censorship but to refuse to accept that it is censorship is ignoring the political reality of the situation. The same corporations who claim they are so offended by O'Reilly kneel and kiss Clinton's ring, when they are kissing more intimate places.