So I saw this “unscramble the secret code” on New Scientist. It has a simple mistake in it, whereby each letter can only go in one position. So, there’s three identically-seeming Is, two Ts, two Ns, etc. Despite looking exactly the same, they aren’t interchangeable.
It’s still a really simple puzzle, and it’s in the same genre of adverts that try to latch onto some psychological assumption that accomplishing a simple task will always lead to some reward, thus making the advertisement seem more valuable than it is.