User blog comment:Brandon Rhea/Why Fandom Evolves: A Look Ahead in 2017/@comment-4457974-20170112201305/@comment-13301-20170112222009

> It was removed due to low usage and a part of MediaWiki that Wikia didn't wish to keep upkeep on

That's a very simplistic reason hard to stand up. No more Special:Emailuser on Wikia