I just got an email about add-ons to the Margot Elena box!
Unfortunately, they're not discounted items. The only benefit is that you get free shipping on them, since they send it with your box.
I can't list/screencap the items now since I'm at work & my break is over, but I remember that one of the items was the TokyoMilk eye shadow palette (I was a little sad to see that since I was hoping against hope that it would be in the box!).