>Google is payed when people leave the page via a click on an ad Not really. The click rate is iirc usually around 5%; I'm not convinced this is much higher t

>Google is payed when people leave the page via a click on an ad Not really. The click rate is iirc usually around 5%; I'm not convinced this is much higher than the "noise floor" generated by a human equivalent of drunk racoons. So in practice Google is being paid for displays.