How does it scale up compared to stonetoss?

https://nhentai.net/g/368435/

manually checking the list, there are some communities that defederated but remain in the list:

• social.cyb3r.dog
• f.jbradaric.me
• bookwormstory.social
• lemmy.vinodjam.com
• ka.tet42.org
• dubvee.org
• lemmy.kensand.net
• moot.place
• lemmy.phoenix591.com
• lemmyland.com
• lemmy.buzz
• lemmy.pe1uca.dev

as well as some communities with policies that would clearly defederate burggit:

• lemmy.serverfail.party
• civilloquy.com (defederated lemmy.burger.rodeo)
• discuss.tchncs.de

The list also includes plenty of single-user instances without any posts, as well as instances using whitelists not including burggit.moe and a few local-only instances, though i didn’t bother making lists for them.

You should be able to fetch instance block lists from other instances (which on most lemmy web UIs is exposed in /instances) - but even that isn’t a requirement AFAIK :-/