There's something funny about how some countries try to enforce this and how Valve "solved" it, which I think demonstrates how silly "there ought to be a law!" thinking can get.

I believe for some regions, Valve just shows you what's in the "lootbox" (case, whatever), and you have to pay to acquire it before you're shown the next one.

This isn't to say I don't fully agree that this kind of thing is probably predatory and probably unhealthy. But I find most discourse on the topic starts and ends at the shoreline with a version of "there ought to be a law..."