1) https://www.indieshuffle.com - a music discovery blog
2) https://www.submithub.com - a service that connects musicians with music curators
I make my living off these platforms (primarily the second). So in essence, my discovery-centric services are viable products. That said, I'm not sure that's 100% what he was after in the Twitter thread this article was based on: https://twitter.com/jherskowitz/status/1466078600822677513