Well, there was a post by thepaperpilot about the instance made on !fediverse half a year ago. Not much has changed about the instance that would be relevant to people from other instances since then, so I'm hesitant to make another promotion post for the instance. On the other hand, the community you mentioned is not the one thepaperpilot posted to around half a year ago (and one where promoting communities you belong to is more appropriate)...