This is one of the questions asked at the end of the Google Tech talk video. The author responds that they licensed it to apple for a nominal fee. He also says

This is one of the questions asked at the end of the Google Tech talk video. The author responds that they licensed it to apple for a nominal fee. He also says that he got paid pretty well as a contractor for apple so didn't feel bad not getting paid for a few months. He also apparently still works full time on this program and spoke passionately about upgrading it to take advantage of GPUs.