I've never played those mobile ad games and this scratched my curiosity. Now you're telling me they don't deliver and I'm curious again, how do they fail their delivery?
But when that trend started back in 2023 or so, the game in the video was much more expensive to produce that what you actually got to play.
The majority of the game will still be timer based buildings/armies (so you pay to speed up) and egregiously p2w pvp.
Supposedly the ads need to be based on some element of the game, so what they do is they make mini-games and use that as advertising material. It's all a tactic to get people to their actual game.
It's basically bait and switch.