>>6
It's the name of the engine like vichan, m8 retard: https://gitlab.com/naughtybits/schemebbs.
This amateur engine is also used here: https://bbs.jp.net/mona/, which is literally mentioned on the "first page" you are referring to, my m8 retard.
You can take this engine and deploy on any domain and call your BigBlackSuck whatever.