^*not necessarily true for podcasts, in which the podcaster could have ads baked into the recording.

Actually not.
I like listening to the WAN show podcast from LTT. Amd as most here prpbably know they are very keen on monetizing a lot on their content.
As it turns out Spotify has different settings between podcasts and music. And they offer the creators to enable ads (even for premium subs) inbetween podcast episodes.
So if you queue the LTT-podcast after a regular song, you can get advertisements before and after an episode.
You can scrub through or skip the ad but it requires manual interaction to do so. And hot keys like on (BT-)headsets don’t work.

I confirmed their existence with the Spotify support