Well, if you block one instance itself in entirety, you can still access some of the communities on other instances, so there is a fairly useful purpose there for some people.
Comment on Blocking communities doesn't work at all
vile_asslips@sh.itjust.works 3 days ago
I’m still new to Lemmy, but I’m not understanding the point of a community mirroring on different instances? If you’re on one instance, like sh.itjust.works, I thought it’d be discoverable on all the other Lemmy instances. I would never see a point in creating multiple instances of the same community if one of mine were discoverable by All.
ogmios@sh.itjust.works 3 days ago
JeremyHuntQW12@lemmy.world 3 days ago
To get around people blocking them.
People block communities because the mods will shadowban them from the entire instance.
Blaze@sopuli.xyz 3 days ago
Sometimes it’s just historical
!android@lemdro.id and !android@lemmy.world have been coexisting for years.
I’ve reached out to the mods of the LW one a few times, they were not interested in consolidating.