stop it in physical games as well

I think the connection to physical cards is pretty weak really - the crucial difference being that if you want to get some physical cards, you go out and buy them (or stay in and buy them I guess). You start with nothing except some cash, and you end up with some random cards, which may or may not be valuable.

Loot boxes in F2P games are not like that - you play a free game, have fun and then end up with this “loot box” without having done anything to ask for it. It’s just there in your inventory, and it stays there until you fork over some cash and see what’s inside.

It’s way more of a temptation than physical cards that you won’t encounter until you buy them.