This is what it seems to me, they made a bunch of skins but only 2 or 3 per mount are really any good (imho), most others are just the most basic reskins that probably not many people would buy so i can see them saying "what do we do to make people buy those basic skins anyway, well let's put them in a loot box with only a small "random" change to get the good skins so they are forced to buy the crappy ones before they get the good ones" Cynical... maybe, but giving the trend i wouldn't be surprised to be close to the truth.