It seems unlikely to me that piracy is a major factor, as headline-grabbing as it often tends to be. It's hard for me to even hazard a guess how the IA's "emergency library" would really affect things; it's not piracy in any conventional understanding of the term, but maybe that makes it more likely to cost authors potential sales, because it's so easy to read the book for free. But I want to triple underline that maybe and surround it with question marks.