Lately I've been thinking about how to increase the revenue I get from my Android apps, and have come to the conclusion that I "need" to include interstitial ads in some form. I don't want them to feel forced or annoying like in many other apps where they pop up when they are the least desirable. Instead I have been toying with the idea of simply having a seperate "Support The Developer" screen in my app dedicated to explaining to the user that although making apps is fun it's also time-consuming and challenging and ask them to support the developer by watching a short interstitial ad. The user would then either tap a button to show an interstitial ad or tap another button to return to the main menu. Of course there would be no attempt to motivate the user to actually click on the ad - Just simply watch it.
I have scanned the web, AdMob/AdSense policies and other questions on here to try to find a clear answer on if this is against any rules. I certainly don't want to do this to have my app removed for violating any policies. I know that there are rewarded interstitials that you can implement, but since this approach doesn't award the user with anything in the app it doesn't seem like the right path.
I really want to ethically be on the right track here, so if anyone has any expereience regarding this, please help.