But... Chrome does do this. They're just not labeled as ads.
Type the letter "K" (or any other single letter) into your Chrome search bar on a fresh profile and tell me what you see. Because I see an awful lot of "contextual suggestions" that are not really any different from ads.
There's no way that's a decent no-history guess for what is intended.
But I do get the feeling that "Kahoot", a mobile game I've literally never heard of, isn't an organic result.
https://i.imgur.com/2uREs6u.png
I think it may be your own history popping up there.
Also, not really related, but from my experience, Kahoot is really popular in education. I bet at least 80% of my classmates in college have used it at least once. I am a bit surprised you never heard about it.