Most of the ads I see are for paid apps. I wonder if there's any data on the ROI for these advertisers. If advertisers are paying $2 CPM, and getting, say 5*$0.

Most of the ads I see are for paid apps. I wonder if there's any data on the ROI for these advertisers. If advertisers are paying $2 CPM, and getting, say 5*$0.99 app sales for those impressions, then it's quite possible that those CPMs could keep up. That's a 72% ROI after the Apple tax. (Note: All the numbers above are made up.)