Not saying I ditrust you, but do we know for sure that those are paids ads not unpaid sugesstions?
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.