Well Savage can make a whole lot more money from a real radio corporation than he would be able to make from a podcast. However it's awesome to have the creative freedom to say and do whatever you wish without having anyone boss you around. So it's going to come down to what's more important to him. Cash or Freedom. He's had so much trouble with various groups rallying against him that I could realisticly see him choosing the freedom. It's a breath of fresh air to not have to be concerned with other people telling you how to do your show. You also can't be fired either. That is nice security to have in the crazy world of broadcasting where everyone eventually gets fired.
As far as "Coast to Coast" goes. Overnight radio has always catered to a different audience. Those people who don't live a typical 9 to 5 schedule. Lots of older people, Unemployed people, Self employed people, insomniacs. Overnighters, truck drivers. A whole lot of interesting types awake at that hour. I'm one of them. I've been this way since High School. I was always the guy who stayed up half the night. Sometimes all night. Certain people function better that way. So overnight programming definitely has it's place for people like myself. There are a lot of us.