On October 8, 2020, Microsoft announced a commitment to ten "principles" of fairness to developers in the operation of Microsoft Store. These include transparency over its rules, practices, and Windows' "interoperability interfaces", not preventing competing application storefronts to run on Windows, charging developers "reasonable fees" and not "forc[ing]" them to include in-app purchases, allowing access to the store by any developer as long as their software meets "objective standards and requirements", not blocking apps based on their business model, how it delivers its services, or how it processes payments, not impeding developers from "communicating directly with their users through their apps for legitimate business purposes", not using private data from the store to influence the development of competing software by Microsoft, and holding its own software to the same standards as others on the store. The announcement came in the wake of a lawsuits against Apple, Inc. and Google LLC by Epic Games over alleged anticompetitive practices conducted by their own application stores.
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