Board Thread:General Discussion/@comment-168424-20180521212704/@comment-24155515-20180622212953

Perhaps they (Seaterror, that is) meant "wiki farms that use MediaWiki", of which there would be a higher likelihood of visual overlap because out-of-the-box Mediawiki comes with Vector and Monobook (among other skins). Many on the (incredibly-non-exhaustive, I believe, but OTOH might be exhaustive as far as notable services by enwikpedia standards) list you linked don't use MediaWiki so of course they're not going to look like it unless they have some sort of equivalent skin on that farm's software.

This, for example, is a different listing on mediawiki.org that is only allowed to list MediaWiki wiki hosts.