The Mac App Store has changed our world. Apps are easier to find, buy and/or download, and upgrade than ever before. Developers can enjoy ease of use for customers, and great exposure with little overhead and minimal web presence if they want to (no need to host the app and worry about server load themselves).

But not everything is a bed of roses for developers in the App Store. Apple provides no clear paid upgrade path for major versions and therefore no incentive to continue developing an app to become even greater.

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