This is what class actions are literally for. Yes, I know it sucks that the only people who make money are the lawyers, but it can result in some behavioral change.

Google is fine attracting bots when it makes money for itself, but it can clearly detect that bot traffic when it has to pay out. There is likely huge amounts of money in total that Google has collected money from in ad buys but that they could also detect as bots. I would think class action lawyers would be all over this given the total amount of money involved.

Are most Americans not able to fight an international tech conglomerate at the drop of a hat?

Small claims court!