I'm sure he got paid big time. But his audience will shrink massively and he'll become a niche personality.
It'll be similar to what happened to Howard Stern when he went to satellite radio; he quickly faded into relative obscurity.
And his bank account exploded in to outer space.
That is nothing like XM radio where I've never met someone who said they had it.
I like the idea of having my music and podcasts all in one place which working across all my devices (Linux, iOS, Windows) and i gave up on them. Spotify may be ubiquitous but they're not engineered for podcasts.