Early 2017, I built Listen Notes [1] , so I can search podcast episodes by keywords and listen to individual podcast episodes without subscribing to the entire podcast. A few years ago, most podcast apps assume you wanted to subscribe to podcasts first then listen. Maybe I’m not a typical podcast listener. I don’t like subscribing to podcasts. I just want to listen to individual episodes then move on. Similar to consuming web contents, I don’t bookmark entire websites. I just search on google, read the web page, then move on :)
[1] https://www.listennotes.com
[edit] This is my Show HN of Listen Notes in early 2017: https://news.ycombinator.com/item?id=13310834