i think those are paid relay
Discussion
what relays are good and free?
paid meaning theyre paid to write but free to read, checkout https://nostr.watch/relays/find
if you wanna save data / bandwith check out nostr:npub1x3azxuysp5vmfer4vgs4jn5tmfcx4ew8sh0qnev7gczljxsr7jwqa3g4el ’s bostr wss://bostr.lecturify.net he can explain the sutff behind it that i dont understand lol