Other than fan rips probably not being viable, could something similar be added, such as
manualy obtaining a game's ost trough an utility
copying the music from the game's installation folder and/or converting it to make it work
common usefull utilities for converting ogg files and other formats (WInLame, specific game utilities)
officialy released soundtracks for free, bandicamp pages http://amontobin.bandcamp.com/album/chaos-theory-splinter-cell-3-soundtrack
whatever else I can't think of right now
But couldn't fan rips simply be re-uploaded somewhere else anyway, and aren't most for personal use anyway?