I’m badly disappointed

No ebook upgrade anymore? Why?

I logged in in my account today to upgrade my printed book "JavaScript: The Definitive Guide, 6th Edition" to the addon ebook version. But it seems that this is not possible anymore? Actually I buy printed books from o'reilly because of this possibility and as I understood it was a promise from you that I can buy later for 5$ the addon ebook if I want to. So what happened to this possibility?
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