A year ago, I bought an ebook via Amazon. When I received it, I was so shocked by the bad quality (e.g., low-res graphics like 300px) that I returned it and bought the same book on the publisher's website. Even though it cost exactly the same, it was like a completely different book, with mixed vector and pixel graphics that made sense and even without any noticeable DRM.

That day, I decided to stop buying ebooks at Amazon. So, who cares if they shut down the download feature? You still have a week to download everything you need, and then you better buy at shops that value their customers' wishes.