We have a free mobile app installed by a very sought after audience. Now we want to display curated ads to our user base, but we're not happy with the pay rate offered by generic ad networks (think about getting paid $0.82 for displaying a Google Ad to Warren Buffet). At the moment we're considering creating our own solution to serve ads and provide a back-end for advertisers with all bells and whistles like reporting/analytics and so on. However I suspect we might be re-inventing a wheel and there's a service, that already provides the required functionality and much more (payments, inventory, etc). Any suggestions would be much appreciated!