I believe that during the week and possibly the week before BM, it is live. People submit promotional spots that just get played, probably without checking.
Incidentally, other times of the year there is no dj, and I'm not sure how the music list is created, but I suspect it's some sort of randomized playlist. In some players, if you cue it up then pause for an hour or two, you can then skip over any crap you don't want to hear. I love it, but there is plenty of crap.
Just up or still up?