When is a banner ad not a banner ad? When it's a hidden video ad generating fraudulent advertising revenue while draining your phone battery and using your valuable data allowance. As BuzzFeed reports, it's been discovered that in-app banner ads have been hijacked on a massive scale to generate revenue for fraudsters working within the digital advertising industry. The people who suffer are consumers and their devices, but also the app developers who receive complaints regarding how quickly their apps are draining phone and tablet batteries. The fraud was discovered by two ad fraud labs, Protected Media and DoubleVerify.