This is what LNBeats spits out. Music Side Project (287) and Sovereign Feeds (55) would be people host on their own site.

There are a few people like nostr:npub15z2javq62eh2xpms7yew0uzqsk4dr7t3q3dq4903uuxdyw2ca3kstx6q95, nostr:npub14c7ksq2wln0s9nftjlr0wv2vqpg5xzvw7jezl3whczc0ff2y97eqerl5l2 and nostr:npub18gp8p84hjmjh9zejdlyqqcg22sj6x3qra0q2ng4v6cxxg95sav8q0mcg5e that are hosting music for a lot of bands so the 342 feeds are probably only really hosted by a few dozen people.