Or an estimated 3600 hours of playtime. The maths start at 10:59 in the video. Angry Joe made a rant about the loot box issue in this game. These aren't cosmetics but actual gameplay changes including unlocking guns.
Average of 15 crafting material(CM) per loot crate
900 CM per class for 2 weapons
3 guns per class
3x4 = 12 guns
12guns x 900 CM
10, 800 CM to unlock 12 weapons
10,800 CM /15M per loot crate =720 loot crate openings
It took them 5 hours to open 2 loot crates on average and you don't unlock them faster if you play better.
Wow...just fucking wow. I'm really hoping this is altered by the time the full game is released because that's insane.