If you were giving out free cookies at the front of your store intended to thank shoppers for coming in, and someone reaches in and grabs one while running past, that's an ad-blocker. Not the most ethically justifiable[1], but legal. This law though is saying that if you have a person at the door who makes sure you are at least browsing the store before giving you a free cookie, that practice is now illegal. This is utterly nonsense to me. Does the Vietnam constitution contain a right to free VOD? How do TV broadcasters get away with it, given they're riddled with "non-skippable ads" -- about 17 minutes per hour of them!

[1] if you want to dispute this, is it just because you're thinking the store is run by a big company you don't like and that you feel rips people off? Does it change though if your mom baked those cookies to give out to try to get people to shop in her little boutique that barely makes enough money to cover rent? The point is just that it's not universally justifiable. I don't care if you block ads (I block them too) or take free samples from stores.