I agree; they should not be valid sources as they have a mixture of in-universe and out-of-universe pages. But I think having the information on the pages becomes more and more important as time goes on, especially since people can't view the sites anymore. I they can't view the site, where else can they get the information but here? I think this is important. Therefore we should cover everything on the sites, but only in their own out-of-universe pages and in the Behind the Scenes section.