My thoughts on the Fountain app: would be a great way to earn sats if you listen to a lot of podcasts. Unfortunately it didn't work for me because I didn't want to be so tied down to listening to podcasts. I shared a few constructive criticisms, it took the makers two to three months to get back to me if I remember right. If you want to earn sats and listen to a lot of podcasts, Fountain might be right for you.