Rules say that the title format is to be followed, but there are no indications of what it is, at least not here on the fediverse.
If this is a sister community of the subreddit with the same name, perhaps the rules were copied over from there but without adapting to how things are over here?
Hopefully he’s just quiet. Having a derelict community for so long could be dangerous very dangerous, specially when it’s expected for posts here to be legit.