I’m not sure what the experience is with other niche genres of music but I’ve found more black and death metal on Bandcamp in the past month than has ever been recommended to me elsewhere. I get the impression that HN posters who don’t use Bandcamp just see it at some place where a band can make a MySpace profile - but it has a serious network effect going on.
For instance, the label 20 buck spin, has a boat load of artists on there. For metal, their profile page on Bandcamp is worth more than a 100 algorithmic playlists on Spotify.
https://20buckspin.bandcamp.com/
I hope Bandcamp can survive this layoff. It is a real resource for music lovers and artists, not a glorified front end for flacs on S3.