You realize how the 'Best seller list' works ?
Beneath the placid surface of Amazon, authors and reviewers have been in a ferment this fall. After several well-publicized episodes involving writers soliciting or paying for reviews,
Authors who have sent gift certificates to reviewers to buy their books. While it’s easy to see the potential for abuse here — “Here’s a $100 gift certificate. Buy a copy of my novel for 99 cents and keep the change” — some writers argue it is no different than sending a physical copy of a book to someone, which is what publishers do in the offline world and therefore is allowed by Amazon. At least, the line between the two is blurry.
Consider the case of Tim Ferriss, the self-help specialist whose extensive promotional activities help power his books onto the best-seller lists. He gave away a thousand advance copies — many more than most authors — before “The 4-Hour Body” was published two years ago. Some went to friends, some to companies where Mr. Ferriss had been a guest speaker, still more to those who helped or volunteered to help with the book. On publication day, all the recipients were sent an e-mail marked urgent asking them to spend 30 seconds writing a review. Many complied. But some readers saw something suspicious.
“Although this generated a fair amount of backlash from skeptics, it was an immense boon for us to have a solid foundation of 200 positive reviews in the first week,” a Ferriss marketing associate wrote in a guest post on the author’s blog in March 2011. “Having a solid Amazon rating gives the book an enormous amount of social proof that can last for years, and (although immeasurable from our end) boosts the conversion rate on the sales page substantially.”
Two weeks ago, Mr. Ferriss brought out his third book, “The 4-Hour Chef.” Published this time by Amazon itself, the nearly 700-page tome came equipped with many five-star reviews posted on the date of publication. Only a few of the reviewers said they had gotten advance copies. Once again, some readers saw something suspicious. “Tons of fake ratings have been posted on the first day that this book came out,” posted a reader who goes by carmex. “Please do not encourage this type of behavior.”
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http://bits.blogs.nytimes.com/2012/12/04/on-amazon-cooking-up-friendly-reviews/