For those of you who tried Ketchapp's games, you may know that a major reason why their new apps almost always succeed in reaching the top chart is that they push out a 1 time interstitial advertising the new game to all their already published apps, which gets displayed on start up of any other ketchapp app. The same interstitial usually does not appear again afterwards. I am looking for an identical/similar service but haven't found any. Admob does offer in-house advertising, but I dont show Admob interstitial on entry and I wouldn't be able to tell within the app if the interstitial received is a regular one or an in-house ad I provided. I also wont be able to restrict showing the ad only when a new game is released and when the user didn't see it before. I am using MonoGame with Xamarin for my apps (C#), released on iOS, Android and WP. Do you know of any service that does what am looking for?