I have just heard about https://signalflow.co via @socool (thanks!)
Focused on electronic music.
a music platform built for artists and fans, by an artist and fan
No idea how relevant it is.
There certainly seem to be some overlapping values;
“The split is the same for music and merch: 90% of the sale price goes to the artist, 10% keeps SignalFlow running.”
“Right now you need one account to host your music, another to talk to the people who listen to it, and a third to sell them anything. Same people, same music, three logins. That is the thing I wanted to stop doing.”
Seems like a new project, and the developer doesn’t seem to be aware of the social web or the potential value of interop yet. I reckon it would be worth reaching out and inviting them to TSMN.