Botnet fraud occurs when an ad is presented, but never viewed by a human; adware fraud, when it's never even presented.
The money wasted exceeds the cumulative digital advertising revenue of all 80 members of Digital Content Next, a trade association whose members include AP, NBC, NPR, PBS, Turner and other publishers.
Fraud will worsen this year. The report predicts $16.40 billion will be lost to it in 2017 (20% of the $82 billion marketers will pay for digital ads).