In-app is far from a lawless, unpopulated no man's land of advertising. In fact, the latest stats show it's actually where audiences are spending most of their time. In the UK for example, just over two and a half hours a day are spent in the in-app environment, compared with only 20 minutes on the mobile web. That's a staggering 90% of the time on mobile spent in apps - whether messaging, social media, music, or gaming. It's a huge opportunity.
"The people who push these kinds of ads are persistent, they are well funded, and they are constantly evolving their deceptive tactics to get around our systems," Leathern told Reuters at the time.