Note 1: Moving things to GitHub or elsewhere does not remove them from SourceForge. So SF can continue to host and enjoy links on unmaintained websites, search engines etc.<p>Note 2: If their business model is offering popular binaries and source, they can just copy these from other sites and repackage them. Open source software allows you to do this. If no one else is interesting in bundling and monetizing, then they can buy traffic and still succeed.<p>Note 3: Remember that academy award winning movie from 1943? Not so great it today's light. While perhaps one of the goals of the Internet and cheap storage is to keep a copy of everything, and its often better to <i>not</i> re-invent the wheel, if something fall by the wayside, and its needed, it will be created.<p>Note 4: There are plenty of websites which catalog useful abandonware, that someone had to find a physical disk drive from. If the software has value, chances are someone will eventually repost it somewhere without a massive organized effort.<p>----<p>There is clearly value in moving over some project to GitHub or elsewhere, but if some things are not migrated or moved life will go on.