I think it overinflates the click rate, which means despite having more clicks on an ad, that doesnt mean that more people bought some product. This devalues click rate which might make the ad service less valuble to advertisers, so they dont spend as much on Google’s ad service.

And in general I think makes any training data for a model more muddy, since adnauseum isnt behaving like a human. So it could make it more difficult to train models that do targeted advertising.

From their website:

As online advertising becomes ever more ubiquitous and unsanctioned, AdNauseam works to complete the cycle by automating ad clicks universally and blindly on behalf of its users. Built atop uBlock Origin, AdNauseam quietly clicks on every blocked ad, registering a visit on ad networks’ databases. As the collected data gathered shows an omnivorous click-stream, user tracking, targeting and surveillance become futile.

AdNauseam is a free browser extension designed to obfuscate browsing data and protect users from tracking by advertising networks. At the same time, AdNauseam serves as a means of amplifying users’ discontent with advertising networks that disregard privacy and facilitate bulk surveillance agendas.