My dream would be that people that are fine with ads should have them, while people against should be able to subscribe to the content. Like Spotify actually, but radio does not offer that.
He seems to be shifting away from that. There is a "private feed" that will "increasingly carry content that will not be available on the public one" (from first 20sec of Making Sense #168). So yeah, he either wants more income or just donations isn't that great.