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Documents/SponsorEdition.md

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+# NanaBox Sponsor Edition
+
+NanaBox provides $99.99 Sponsor Edition addon to the Microsoft Store for attract
+more sponsors and contributors.
+
+It's free for NanaBox source code repository contributors.
+
+## Feature
+
+The only difference for NanaBox Sponsor Edition is showing "Proudly Sponsored"
+button instead of "Sponsor NanaBox" button in the next stable version of
+NanaBox's toolbar like the Visual Studio administrator mode.
+
+![VisualStudioAdministratorMode](VisualStudioAdministratorMode.png)
+
+## Purpose
+
+Hope every NanaBox users happier than before. Here are some imagination
+examples.
+
+- Most users: We are happy with using a $99.99 product freely without feature 
+  differences.
+- Contributors: We want to show "Proudly Sponsored" button to others. It's free
+  because we are the contributors. Contribute it if you want to get that free.
+- Sponsors: We can show "Proudly Sponsored" button to others because we deserve
+  that.
+- The author of NanaBox, Kenji Mouri: Finally, NanaBox has the price. Nobody 
+  will think this is a worthless product. Efforts from contributors and I should
+  have a reference price even NanaBox is a fully free and open source project.
+
+## Notes for NanaBox source code repository contributors
+
+If you are the contributor of NanaBox source code repository, please contact
+with Kenji.Mouri@outlook.com for more information.
+
+Note: If you are the contributor of Project Mile projects which is used in
+NanaBox, you are eligibled too. I think I have sent e-mails or QQ message 
+to all eligible Project Mile contributors.