AFAIK Saidit does not have a core mission of never banning subs. A sub whose primary purpose happens to violate TOS or pyramid of debate may end up getting the axe here.

That said I don't know the specifics of whichever sub you are referring to.

Also worth noting sometimes subs get banned then re-instated, e.g.

https://saidit.net/s/cryptocurrency/comments/qz/why_is_rbitcoin_banned/