I think this is for one hyper-specific case that he in fact "okayed" the switch to BSD.

    In response to the change of license, Richard Stallman of the Free
    Software Foundation says, "I agree.  It is wise to make some of the
    Ogg Vorbis code available for use in proprietary software, so that
    commercial companies doing proprietary software will use it, and help
    Vorbis succeed in competition with other formats that would be
    restricted against our use.