It hasn't been "trading" in the normal sense of the word. It's essentially dead. If it weren't for KA/GAs monthly manufactured trades, there would be almost zero trading for months at a time. Can't let that happen, can we?
I think what we just saw was someone who knows how dead it is and just said "Screw it, get what I can and forget about it."
Or even if it was a n00b mistake, it was still a real trade. Just not one you're fond of.
No worries, KA/GA will artificially arrange to trade it back up. .0001 is just too humiliating for this "gold mine".