From the persepctive of the host site, maybe. But for the advertisers, AdNauseam punishes them pretty badly. The idea is to destroy the relationship between the "click through rate" and "conversion rate" of offending sites/ads.
The linked article discusses the phenomena in more detail, but the bottom line is that advertisers want sales. If their ads don't get sales on a certain platform, they will no longer advertise on said platform.
That's without even considering how this screws up the data that organizations like Google are trying to track. That data is worth something to them, and this obfuscates it.