What difference does it make if it is copyright infringement or 'piracy'?
We're talking about incentives for authors and how they can fund their risk/time for publishing a book.
EDIT: Interestingly, the first recorded usage of "pirate" to imply copyright infringement is from 1913, talking about "pirate broadcasts".
I would consider this actually to be a serious point. Indeed there exist people who complain that the focus of Hacker News has shifted from what it was in the past.
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Nathan Bailey's Dictionarium Britannicum - 2nd edition - London 1736
Pirate: one who lives by pillage and robbing on the sea. Also a plagiary.
https://books.google.ch/books?id=O50-AAAAcAAJ&pg=PT181&lpg=P...
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Daniel Defoe's The True-Born Englishman - First published in 1701, the quote below is from the explanatory preface added in a 1703 edition
Had I wrote it for the gain of the press, I should have been concerned at its being printed again, and again, by pirates, as they call them