“advertising” is not just the obvious obnoxious youtube preroll ads and flashy popups. Sponsored products, in content product placement, adjusted and paid ranking, it takes so many more forms.

Also a lot of people won’t be able to make the distinction between an ad entry and an organic entry in a listing. I’ve mistakenly hit ads, and might be hitting some here and there without realizing it, and I would bet you do too.

That’s part of why legit businesses have to buy ads for their own product to avoid having a competitors eating up their result page and getting all the misplaced hits.