PT allowed streaming playback of torrented movies and was very clearly piracy and illegal.
Meanwhile, this seems like an aggregator for existing free sources of music (Bandcamp, YouTube, SoundCloud).
That said, it looks like a cool hobby project and a great alternative for folks who want/need a multi-source music client. Google Play Music was my go-to service for a long time since I could not only get streaming access but also upload my own local files to their servers for playback anywhere. Most of that local music came from Bandcamp.
youtube-dl breaks all the time (but fixes get pushed upstream quickly). I don't know if this is intentional or accidental, and I won't speculate. However, it's a constant game of cat and mouse.
Now I haven't checked if those bands are sharing free promotional material on Bandcamp, SoundCloud, etc. but something feels a bit iffy about this.
I'd be a lot happier if the artists featured were clearly releasing music under Creative Commons or something like that. Right now this makes me think that if I use it the music streamed would be against the artists' wishes.
Just like with software, FOSS is better for everyone than just pirating commercial software.