Looks like it had about 1000 subscribers: https://subredditstats.com/r/macOSVMs
Obligatory: fuck spez
They care about people seeing ads. And that’s it. I agree with you that Reddit is dying (very slowly), but there are millions of dollars to be milked before the platform is fully dead. And for everyone like you and me, there are thousands who are there for the generic communities. Most people on Reddit don’t post or comment, those don’t strike me as someone who would enjoy being part of the niche communities.