https://www.theverge.com/2018/12/19/18140799/amazon-marketplace-scams-seller-court-appeal-reinstatement
The start of the article:
Last August, Zac Plansky woke to find that the rifle scopes he was selling on Amazon had received 16 five-star reviews overnight. Usually, that would be a good thing, but the reviews were strange. The scope would normally get a single review a day, and many of these referred to a different scope, as if they'd been cut and pasted from elsewhere. "I didn't know what was going on, whether it was a glitch or whether somebody was trying to mess with us," Plansky says.
As a precaution, he reported the reviews to Amazon. Most of them vanished days later — problem solved — and Plansky reimmersed himself in the work of running a six-employee, multimillion-dollar weapons accessory business on Amazon. Then, two weeks later, the trap sprang. "You have manipulated product reviews on our site," an email from Amazon read. "This is against our policies. As a result, you may no longer sell on Amazon.com, and your listings have been removed from our site."