The thing is, there isn't really anything that easy to move to. No, no github, because we don't like git. We have a bunch of Mercurial repos. We could try moving them to bitbucket, but this also leaves the question of what to to do with our webpage hosting, which is currently on SF.
And no matter what we decide doing, it's all a bunch of work that nobody really wants to do.
At least when SF first approached us with their "revenue sharing" bullshit we refused. I think this means our downloads are clean so far.