Google has massive teams that are devoted to detecting click fraud and getting rid of it. They really really want to detect and remove click fraud. If I'm sel

Google has massive teams that are devoted to detecting click fraud and getting rid of it. They really really want to detect and remove click fraud. If I'm selling a product that makes $50 profit, all I care about is how much I have to pay to get a conversion. If it takes 100 clicks for a conversion at $0.50 per click, that is same ROI as 50 clicks for a conversion at $1 per click. So if half the clicks are from bots, I'm just going to bid half as much. Maybe in the short term I'm not going to, but certainly I will adjust in the long term. Which of course is not what Google wants. Google doesn't want to make money at the expense of creating long term customers. Google wants the conversion rates on their platform to be better than the conversion rates on other platforms, which is directly comparable at the customer end. So by detecting and controlling click fraud, Google gets higher CPCs (which they like), their platform has higher user end conversion rates (which they like), it builds trust and consistency in their platform (which they like), and in the long term they don't even lose money because CPCs will just adjust upwards as fraud goes down.