https://www.cnet.com/news/john-oliver-promoted-vote411-to-get-out-the-vote-then-scammers-made-a-fake-version/

The page gained a 2,000 percent spike in traffic after John Oliver promoted the website on his show last week. Two days later, scammers made the website Vote411.com redirect people to to a page telling them their device was infected with a virus.

It includes a phone number to call, which is a common online scam where a pop-up will tell someone their device is infected and request they pay to fix it. Often times, there's no real malware involved.