I listen to a number of NPR podcasts and don't live in the US.

I used to live in the US and donate to my local NPR station.

It's strange that on every podcast episode they don't suggest a way for me to contribute. Other successful podcasts like The Guardian's highly entertaining Football Weekly podcast also suffer from this.

I'd like to contribute something sometimes. I've bought t-shirts from podcasts that suggest that (Planet Money, 99% Invisible) and am happy to do something.

Also, the ads on podcasts are not well targeted. I've heard of Squarespace...

It's remarkable that there isn't a good clean way to put ads into and better monetise podcasts.