I assume this means an in-game ad like a billboard as opposed to a literal full ad
With advertising it always starts off small or low key, and they demand more and more of your attention as time goes on.
Just look at YouTube ads. They started off as short ads at the start of the video, skippable after 5 seconds. Then the time it took to skip the ads got progressively longer and longer until you couldn't skip them anymore.
Then an ad appeared at the end of the video.
Then adverts appeared in the middle of the video.
Then you get 2 unskippable ads at the start of the video.
Then you get an extra 2 unskippable ads less than 1 minute into the video, with more coming every 5 minutes.
Now YouTube ads are so bad, they're hijacking Apple TV screensavers when your video is paused, stopping your device from going to sleep and pumping adverts into your living room. It's grotesque.