I don’t understand why advertisers put up with this scheme for advertising: the app you’re running displays advertisements until you decide to pay the programmer money to upgrade to the non-ad version.
I understand why the programmers like this model, it ensures them income one way or the other. But advertisers are getting a raw deal.
Their ads are displayed in a way that is designed to be a nuisance and therefore carry over negative feelings their products. But worst of all, they are reaching only a particular self-selecting sub-set of the audience. Ironically, you see, advertisers are paying to show ads to only those app users who choose not to spend money. Advertisers want us to spend, but the app users who are the spenders are precisely the ones who do not see the ads!