I don’t know about the latter half of your statement, but my main reason for its use is pretty simply just that there’s more music available, and it doesn’t take all the time it normally would to get invited to a good music tracker. If anything, specialized Torrent trackers that could offer the same volume of music are a much bigger pain go deal with.
It’s a bit difficult in a case like this, as it does add context and acknowledges their new identity so as to link what was a well known video to an existing person. I’d struggle to know who this was otherwise. I don’t think there’s any malintent here.