Lock boxes means money, CRYPTIC knows this instinctively. The only ace they have are the ships, that's because what attracts players are the vessels themselves. Personally CRYPTIC is slowly running out of canon ships to stimulate any further interest.
Once the canon vessels run out, they are going to have to come up with virtual items that will replace the ships to generate any interest in the boxes.
So far we have in these boxes:
A) Jem Hedar Bug
B) Cardassian Galor Cruiser
C) and now the Ferengi Marauder D'Kora Class
Ships that are possibly coming out:
A) Breen Cruiser
B) Cardassian Keldon Class
C) Romulan Warbird
D) Romulan Escort
E) Romulan Bird of Prey
F) Klingon Bird of Prey (Possibly in relations to "The Voyage Home")
G) Jem Hedar variant --> Battleship or Dreadnought
Far Stretch ships in a box:
A) Tin Man <----though I suspect this may turn out to be a mini pet o some sort
B) Tholian vessel - web spinner
C) Vessels from various / TNG episodes.
Truth is CRYPTIC is slowly running out of canon ships, and the main motivator for the purchasing of these lock boxes are the ships themselves.