As the API program evolves with the business, we now need to make some changes. While we will continue to support third parties as they develop and offer Web sites and applications that interact with Netflix, these changes are designed to do so in a way that is aligned with our broader objectives.
What they are announcing is that from September 15th you will no longer be able to export your viewing history and associated ratings through their API. All API endpoints that expose rental history, and other parts of the API that tangentially supply that information will be removed. All they’ve said regarding motivation for that change is that they are changing their API so that it “is aligned with our broader objectives”. It appears Netflix considers what films you’ve watched and what you thought of them as their data, not yours.