AdNauseum doesn't hurt advertising networks, it hurts publishers. When they get banned for click fraud, the network keeps the money.
Also, increased click fraud on tracking ads lowers their attractiveness, nudging ad revenue toward sites that serve display ads targeted to their content.
This helps funnel money to sites that produce high quality content and away from low quality sites that happen to attract users that view high quality content elsewhere.
They become the publisher. In the grand scheme, this is a misguided effort that will further monopolize publishing.