Here's the thing. This is like a microeconomics modeled market. If the click rate is inflated by 25%, I'll wager the payouts compensate by being deflated by 25%. Advertisers are willing to pay for clicks, and will probably adjust their prices accordingly.
One of the few times I feel comfortable saying online that the free market will handily solve this problem, without worrying that I'll end up sounding like a lolberterian.