Earlier quoted context omitted.
Just to compare I searched for "insects in pleistocene", and guess what, no ads, zero, no sites from "advertisers" too. Ah, well there is an entry from google books, in 5th position, crap, I certainly didn't want to know that somebody wrote a book about that... Wow you got me, you are so smart. Google has no ads for those words so they put no ads. Proof that they are fair and unbiased. Google makes most of their mone…
You are taking for granted that when you don't search for something you don't get ads. But that's something that's very specific about standard that was set by google with its non intrusive ads. Most of the other commercial sites, including search engines, were filled with blinking banners trying to sell you anything, even if you just searched for boring entomology. (The same pattern is repeating with ads in mobile a…
The content is non-intrusive, ads are everywhere.
You will find the same old crap of booking aggregators and resellers and cheap offers whatever. That's because the content is what it is. Companies would do nasty tricks to end up higher in that free-open search engine, exploiting fake content (I mean, there is already plenty of that stuff already, so I guess you know what I mean)..
Google is supposed to be neutral, not force sites to advertise for traffic. In case you didn't know, aggregators like Expedia often have the lowest price. Not the 745223587 ads you see per page, and especially not Google travel.