I listen to Wait Wait, which sometimes tries to promote other NPR podcasts but never in a way that makes them interesting. For like a year they had an ad that was just an out of context clip from a Matthew McConaughey interview that made absolutely no sense to me.

Anyway, Wait Wait and Planet Money have paid ad-free podcast tiers now.

The rest do seem to be serial podcasts about true crimes or otherwise why you should feel bad about someone somewhere.