Very informative post. This could be why one of my Renaissance reviews went missing even though I have never (and would never) buy a review and have so far followed all of Amazon’s review rules. They are cracking down. I agree with the idea that reviews should be spread out, left not just on Amazon but also on places like B&N and Kobo if the author is there. I suppose this would also mean that authors would probably want to consider publishing on these other platforms as well, instead of just on Amazon.