Matthew posted the link further up, you add your profile details within your Roon profile itself, then everything you play within Roon is scrobbled to Lastfm.
The post I referenced was just to allow people to “out” their lastfm profile on this forum and there’s no actual need to do that.
Following people on lastfm doesn’t require that you know who they are, they are a source of information only and that information comes from all people who scrobble to Lastfm via whatever means.
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