When I followed the Valve game CS:GO a few years ago, I was pretty disgusted by the gambling done in that game. It made up an insane % of players, many of them children, who would bet weapon skins on third party websites based on ESports games. Valve shut those third party sites down but continued to market different kinds of skins such as gloves, music, etc. I wonder how much money moved to and away minors during that period.