Just following up on this a bit...
When you buy a book from a vendor like Amazon or Rakuten Kobo the vendor knows who you are and what you've purchased. This is patently obvious to the consumer: of course the vendor knows what you're buying, and of course they know who you are when you use a credit card.
What isn't necessarily obvious to consumers is that when RMSDK DRM is involved then Adobe also know who you are and what you've purchased. This is where the privicy concerns start, and given the costs associated with GDPR violations I can see Rakuten moving to minimize the risks.
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