As much as I hate malware, can we confirm it was sourceforge that got rid of the old page? Maybe someone set up the mirror after a data problem or error rendered the old page blank and just wanted to get it up, or that person was nefarious? (Occasionally people can be "too helpful" on community sites by registering other people's projects).
I guess the question is really who owns sf-editor1/2/3/4.
The reason being I can't see a lot of bonus for someone doing it this way. I'd just put adware in the margins. The site looks sketchy anyway these days so it's not doing them a lot of good...