While it's unlikely that we would get a somewhat official answer on this, there can be a multitude of reasons for that, some logical, some economical, some motivated by marketing. Of course, there are some more obvious reasons for the sake of the build and the art of LEGO, but they might not apply in the case of a calendar:
Design. This isn't necessarily ...
Thanks for getting in touch with us.
We're sorry about the frustration you must be feeling. Unfortunately
there was a misprint on the packaging. The real website to enter the
codes is www.starwars.lego.com.
When you get to the site in the middle of the page is a place for you
to enter in the codes. I hope this helped.
Thanks again for ...
I just found this website:
it has special stuff each day, the place you enter the code is the image of jango fett in the bottom middle.
The instructions to build it are on the back of the flap and to enter the code go to lego.com/starwars and go to fun and games or something. It mentions games. Anyways, there is a game called "Advent Calendar" and you click on a button torwards the bottom of the game screen (which you can make fullscreen) and enter the codes. They just unlock minifigures ...