Let’s Talk About Amazon Reviews: How We Spot the Fakes

The Wire Cutter explains how Amazon reviews can be influenced e.g. give away products for free (or sell them at a deep discount) to potential customers vetted (by Amazon in the case of the Vine program) for the helpfulness of their reviews, in exchange for an “honest review.”

Fakespot is this site mentioned that allows you to paste the link to any Amazon product and receive a score regarding the likelihood of fake reviews.