New Google Play Requirement: Features requring in-app purchases must be labeled

From the Google email:

We've updated our content policies to further clarify our stance on sexually explicit material and provide a better experience for our users, including minors

We’re introducing the App Promotion policy, which provides guidance on what app promotion tactics are disallowed when promoting your app on Play

We’ve introduced a provision that requires you to clearly disclose when an advertised feature in your app’s description requires in-app payment

We’ve clarified the System Interference policy to prohibit any browser modifications on behalf of third-parties or advertisements

We’ve re-emphasized in the Ads Policy that all advertising behavior must be properly attributed to, or clearly presented in context with the app it came along with