Analysis of information sources in references of the Wikipedia article "Loot box" in English language version.
In a lot of ways, that's the same psychological mechanisms that are going on with random loot drops in other games like your Diablos of the world...whether you get that by playing the game for so many hours or winning so many matches, or whether you get a roll of that random number generator from spending five dollars to buy a pack of cards or a loot chest, it's still the same rush, the same experience, the same hopeful anticipation.
