I don't get why designers are always doing stuff like redesigning website X for free, without being asked to, but miss great opportunities to be in the spotlight by participating in projects like GNome, KDE or the likes. There are many examples of good OSS projects that could use some UX/UI love, one that comes to mind right now is Moodle, for example.
Is it designers that don't like to participate in OSS? Are programmers making it harder for them to join these type of projects or is simply the fact that they don't bring to much excitement or challenge to the design community?