User blog comment:DaNASCAT/Technical Update: May 6, 2015/@comment-5558012-20150506182506/@comment-4189499-20150509045018

The vast majority of redlinks on our wiki do come from those welcome messages, and many of the others from links on the user talk pages of admins from when people linked the questions in a request for their immediate deletion. I think I might take that advice about using external links in the welcome message. Because of this, especially due to the vast quantity of pages which are deleted and still need deleting (last I checked, my delete count was greater than my edit count), Special:WantedPages is completely useless on our wiki.