Amazon's "Verified Purchase" system is easily gamed by setting up a highly-discounted short-run coupon code which is then distributed to professional reviewers.

Amazon's "Verified Purchase" system is easily gamed by setting up a highly-discounted short-run coupon code which is then distributed to professional reviewers. These reviewers receive their item with the implication that they'll wink wink nudge nudge review the product accordingly. It's pretty easy to identify these garbage 5-star reviews once you learn to spot them though. They're everywhere and frequently used for product launches to help snowball sales.