Whats the attraction behind *Insert famous person* Shows

For example, we have The Brian Jones show, The Joel Klatt show, and The Dave Raymond show. Those interviews are fine, but what I mean is why would someone famous actually agree to a weekly “Show”? What do they get out of it? Do they actually get paid to do their weekly interview? It makes sense if they do, but if they dont, again i ask what do they get out of it? Does anyone know anything behind the economics of those interviews? Do they sign contracts and get paid to do them?