Some years ago I applied at a "data analytics" startup founded by a locally famous founder. Their official purpose was something something search something social media. Not in the US, but he was featured on our local version of Shark Tank at some point.

During interview it became clear that their "product" was actually bundled malware that replaced google's and other ads in the browser. Evidently hot founder guy was using this startup as cash cow for his other ventures.

There was some noise in the press about it a couple years later and founder guy defended himself saying he sold the company and wasn't responsible, except it was already malware when I interviewed and he was still owner so I know it's bullshit.