https://www.theguardian.com/games/2018/may/29/gamers-politicians-regulation-video-game-loot-boxes

This money-making addition can ‘exploit and manipulate’ players. But the impact on children is the biggest concern

“Loot boxes are like scratch-off cards: you open one out of curiosity, get a little prize, think ‘darn, maybe next time,’ and then it just turns into a habit,” says Brian. “I got a big prize with my first $20 and thought, ‘Hey, maybe I’ll get something good again,’ and spent another $5 next week, and then $5 more. It’s a disturbingly easy trap to fall into.”