- Promoting more characters, items,and also special things in the game
- Using it to make more powerful characters, things, or event something different and special
- Add more income
And about how many children are using it and spending so much money, it may be the role of parents to control their children in playing the games.
Yes, this might be addicted into those youngsters but as long the items inside of those lootboxes arent something compromising those who had bought specially children or young minds.
Companies who had done such stuff made out some new way or innovative method for them to sell out those loot boxes.I dont see anything wrong with that.