For web apps, the eCPM can be pretty horrible if you're not in a decent niche. Mobile eCPM is sliding downwards as well. If the ad supported business model is

For web apps, the eCPM can be pretty horrible if you're not in a decent niche. Mobile eCPM is sliding downwards as well. If the ad supported business model is derided, it's because a lot of them treat monetization as an after-thought, rather than something that should be baked in the product. There's also a wishy-washy quality that a lot of people have, about thinking you can get ramen profitable just by slapping on an Adsense banner.