AdNauseam is an extension that clicks ads at random in the background, thus polluting your user data. It was useful enough to get banned from the Chrome web store.
It’s probably wise not to encourage interstate advertising fraud that the FBI might decide to investigate and arrest you for knowingly participating in.
They arrested people for making money by generating fake clicks on their own site. AdNauseam isn't ad fraud any more than running a web crawler bot is ad fraud.
I’m sure you’ll be fine, eventually - but that’s not guaranteed to stop them initially, or without a digital search of your entire computer, for example.
I am neither a lawyer nor do I work for any criminal justice entity, apologies. You’ll need to discuss this with a lawyer if you’re materially concerned about this line of reasoning coming to pass.
I, personally, think you're full of it, but I'm offering you the opportunity to present evidence for your claim that using AdNauseam is "interstate ad fraud" that leads to arrests of its users. If I were the dev I'd consider those claims potentially libelous.