You are partially right, but more recently, as in animals or in this case beasts. During the events for thanksgiving comes to mind. You can craft 3 of the costumes but will only get one animal to wear it.
Well, at least I got 2 hatched. Now I'm chopping trees like deforestation is a hobby and making living wood. Got my 5 conservatories at work, too. Slowly now, but started again to send knights, just not as often!
Wish me luck!