Now I can only assume two things...
1. Some number of those ads were scams 2. Some large number of people just blindly click on the first thing they see below the search box as long as it's close to whatever they search for.
Somewhat related... always surprised to see what search results come up in the IOS app store first for whatever app I'm searching for at the time. It's usually something else, like, search for Uber, first thing that comes up is Lyft.