It's factually wrong. First, while Google aggregates lots of data for analytics and advertising, and if subpoenaed may be able to say that a given user visited

It's factually wrong. First, while Google aggregates lots of data for analytics and advertising, and if subpoenaed may be able to say that a given user visited a given pirate site, they only know the user opened pages -- not that they clicked a download link or successfully downloaded an ebook, because the ebook file itself contains no Google advertising. It's not illegal to do a search on a pirate site. The only illegal part is the downloading, and ad networks don't have any record of that part.