I think most organists would only join Hive after the majority of other classical musicians would. When it's safe. Just look at Spotify. It's a mammoth platform but organists are still relatively rare there. It's more popular among other musicians. That's because organists generally are not known to be pioneers. They are backward-looking folk for the most part. Hauptwerkers are the exception of course. But it doesn't mean they would join Hive either because they have their own little paradise (Contrabombarde Concert Hall).