Quora being a good option is incredibly surprising to me. I never click on Quora links as 90% of the time the "answers" are just ads or people who want to pretend they are a bigger deal than they are and know more than they do. I'm a little surprised podcast ads weren't tried, mostly because I'd love to know how well those do/don't work out for a tool like this.
It never helps either, so I go back. And I don't think any ad pass through my ad-blocker. But I'm not very surprised by the ads there being useful.