If naked shorting actually occurred on the Berlin exchange, then it's possible that they are trying doing all they can to "cover" at these low prices. I'm sure someone would argue that the pps should rocket up if they're scrambling to cover, but trading volume has been down. Back in December this used to have an upwards to 1000 trades a day, now it's like 100 or less. I think that the longs have bought all they can for now and new investors are probably skeptical about AMBS.
Currently the L2 shows a MM with a 218K wall @ .064 which leads me to believe that someone is holding this below .064 to purchase cheap shares or cover. I think it's the latter. I saw some interesting buys/sells for the same amount of shares with a .001 cent difference that were traded back-to-back, same timestamp. Go figure.
If any other longs have $13K lying around to tear down that wall...well we could see pps move back up. Time will tell.