From our man himself, he didn't like them but he had to include them. I'm pretty sure BOTDF sold that amount because of the 5 previously unreleased tracks.
B&W: What do you think of the remixes they did of your songs?
MJ: The least I can say is that I don't like them...I don't like it that they come in and change my songs completely. But Sony says that the kids love remixes...
B&W: That is not true! The kids don't love the remixes that much, especially those on BOTDF!
MJ: I knew it! I was sure!
Throwing a fist in the air, then he shakes his head sighing
http://maljas.republika.pl/wywiady/bw.html
As a child I listened to the radio a lot and in 1997 Blood On The Dance Floor and Ghost received a lot of rotation while remixes were rarely played. And when I listened to them I remember going back to the original songs instead.