I think this is just a publicity stunt.
Looking at this from a third person perspective and seeing that this guy is still betting I guess that Primedice isn't in trouble for now. At least not yet. If this is really happening the hard part for PD should be paying out this guy. That's a great way for us all to see if Primedice is really as big as it wants us to believe it is.
But all this makes me somewhat suspicious too.
HUfflepuff has been paid out in full.
Our max payout is now only 20 BTC instead of 40 BTC.