Things are changing at the O'Reilly online shop—as of today, we are no longer selling individual books and videos via shop.oreilly.com. Of course, we'll continue to publish books and videos on the topics you need to know, like data science, product management, and leadership—and you'll still be able to buy them at Amazon and other retailers.

O'Reilly will continue to offer its ebooks through Safari Books Online, its subscription service

Note - Amazon is actually selling you limited right to access your ebook, and it can be revoked any moment.

Subscription service is not only more profitable, it is also in ruling class interests, as books are part of means of production, so ownership must belong to the ruling class only.