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They intentionally provide this information to marketplace sellers. It's arguably poor design but it's definitely not an unintentional security flaw. Marketplace/FBA sellers have talked about strategies for utilizing customer email address for years [1]

[1] https://sellercentral.amazon.com/forums/t/how-to-access-all-...

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No, the email address listed there is an @marketplace.amazon.com address that forwards messages to the customer while adding an Amazon footer, not the actual user email address. If the latter was shared with sellers somewhere, that was not intentional.

Also, your Amazon profile is public by default, especially any wishlists.

This is incredibly creepy. A few months ago I realized this and was able to find some friend's profiles and see their reviews. I hate implicit sharing/suggested friends/etc in services especially non-social services. For instance, my friend is following me on a tech shopping site I use... something I have 0 interest in. I've started attaching pseudo anonymous sites to a backup email address for this reason. If I want to friend someone I'll find them.

Wow. That's incredible. I would say this is completely against what I would assume the expected behavior would be.

It kind of makes sense for wishlists.

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