I remember these before I discovered MANTIDS, but by that time, it was pretty much known that no one knew how to feed them and they all died without reproducing. Orin and Peter would have more up ro date and perhaps more accurate info, though.
Nothing has changed as far as their success in captivity. Their already low availability in the US hobby has only decreased since our reptile importers were forbidden to legally import millipedes through customs, as of a few years ago.