Committing copyfraud is astonishingly easy and costs nothing. I can borrow a public domain book from any library and scan it, or I could download the text from Project Gutenberg. I reformat it as a PDF, mark it with a copyright date, register it as a new book with an ISBN, then submit it to Amazon.com for sale. I may not even need to print and bind any books, I can offer it through Amazon's Booksurge print-on-demand service, or as an ebook on Kindle. Once the book is listed for sale, I can submit it to Google Books for inclusion in its index. I could easily publish thousands of books; most would never sell, but with zero up-front cost, any sale is pure profit.