Look at all these promos OOO is releasing. Look at the game. There isn't much content at all. It's barely changed from 2011 (sans the Battle Sprite update and the Energy overhaul).
The items in promos could be used for actual future gameplay content instead of just squandering those brilliant designs and making mindless fools spend hundreds on them. Seriously, I saw a fella in Haven who spent 400 US dollars on a celestial shield. But knowing OOO, this will never change. Kind of makes me sad, to be honest. I remember in the early days the game seemed like it had a good future ahead of it, but no, money corrupts humans, as we are weak.
http://forums.spiralknights.com/en/node/89218
http://forums.spiralknights.com/en/node/90696