One place where this is the case is when developing Kindle apps using the SDK. From https://kdk.amazon.com/ https://kdk.amazon.com/: "Active content applicatio

One place where this is the case is when developing Kindle apps using the SDK. From https://kdk.amazon.com/ https://kdk.amazon.com/: "Active content applications that are smaller than 1MB and use less than 100KB/user/month of wireless data may be offered at no charge" How apps are priced takes into account their data usage over their lifespan.