If you read the article at the link i provided you will see the article states ‘frequently out of print and out of copywrite-” Indicating ‘not always’ out of print or copywrite- and like i said in earlier post- there is no mention about exerts, and there are indications that the issue is about whole books being published- I don’t see writers being upset over having an excerpt being published to showcase their writing style and writing abilities- but i do see them upset if their books are being copied word for word in whole-
The link was to public domain books, in fact, every document on that page is also part of the Internet Free Library project as well, and also published by individuals on Amazon’s Kindle and other platforms.