I could be wrong, but hear me out. The text of the boxes mention "A very high chance to contain something not already owned". The emotes are placed inside of a consumable looking thing. The armors are placed inside of a consumable looking thing. Everything pretty much is. Could be possible that getting one of those unlocks all of what's inside of it? Or I could be wrong. There's tons of those consumables, however, so it could also make sense? And here's the thing. You get 3 every single week. Implying Destiny 2 is out sometime in September, that's 6 months. That's 72 boxes you get. 3 a week with a VERY high chance to contain something not already owned. So.... have fun?