Earlier quoted context omitted.
Why Spotify plasters your home page with Podcasts: Short answer is $$$$. Longer answer is: Spotify must pay royalties for each song played. Imagine if there was a completely free (for Spotify) form of content that filled users ears for hours, thus removing the need for Spotify to pay royalties. Ahem podcasts. Now imagine if Spotify started injecting ads into said media form to grow their revenue beyond subscriptions.…
Does Spotify inject ads in free podcasts? Don’t all commodities not do that
It was extremely unsettling until I realized what they were doing.
They replace the ad breaks that would normally be in a podcast. (Like when the hosts say "we're going to take a quick break to talk about our sponsors for this episode"). It's not an unskippable ad like you get when listening to music using the free tier. It's inserted directly into the audio stream.
Edit: I guess it's possible the Conan podcast is doing that somehow and not Spotify, but I've never had something like that happen when using the Apple podcast app.