On iOS App Store at least, my observation is they just show you a random irrelevant ad at the top if there’s no one specifically bidding for the term. Well that

On iOS App Store at least, my observation is they just show you a random irrelevant ad at the top if there’s no one specifically bidding for the term. Well that’s my assumption for why I get irrelevant <app with deep pocket> ads when I search for obscure terms. But maybe they don’t show an ad if there’s no bidder at all for garbage spots in <country>?