Why would you have expected any different?  Scrypt in general have been declining in value the entire year, lead by litecoin. 

Anyways, to the OP, I would imagine most of the people purchasing scrypt asics aren't actually purchasing them, but manufacturing them.  Think companies like gridseed.  And then too people who can purchase them for substantially less than full retail price.  If you can get them for anything less than about half the prevailing retail rate they are profitable.