Online store buys ads on Google to tell people about their products. People click the ads, and buy the products so the store can scale up and lower their per unit cost. Everyone are happy.
Now fast forward a decade. Google drop their "do no evil" motto and jack up ad prices. Online store now pays 10 times as much for their ads and have to raise prices to cover the costs. Google shareholders are happy, everyone else loses - it doesn't matter if they click ads or not, the prices are higher for everyone.