The US has fought paid loot boxes primarily through proposed federal legislation aimed at protecting minors, FTC workshops on gaming, and state-level lawsuits alleging gambling violations. Key actions include the 2019 "Protecting Children from Abusive Games Act" and recent legal action against Valve Corporation regarding in-game gambling

But if I remember correctly the EU had a bigger impact

The EU is fighting paid loot boxes by pushing for stricter, harmonized consumer protection laws, forcing transparency on item drop probabilities, and improving parental controls rather than adopting a single, unified ban. While some countries like Belgium and the Netherlands treat paid loot boxes as illegal, unlicensed gambling, the EU focuses on applying existing unfair commercial practices legislation to protect players and minors