Yup. You're right. You can do that. You then have the problem of writing and maintaining the code for the IAP, which isn't always trivial. But yes, absolutely

Yup. You're right. You can do that. You then have the problem of writing and maintaining the code for the IAP, which isn't always trivial. But yes, absolutely do-able. At this point it's the same thing as selling an invisible skin for your app. The fundamental issue is that of selling vs donating.