Despite a crackdown by Amazon, sellers on the platform are continuing to purchase fake reviews for around 15 euro each (about Rs 1, 200), according to a Daily Mail investigation.
The companies selling fake reviews to sellers rely on an army of "testers" who buy the products to post the four and five - star reviews online, said the report on Sunday.
The testers get the refund for the cost of purchasing the products, in addition to a small fee.
The testers buy the products so that the reviews they post get classified as "Amazon Verified Purchases".
One review firm, AMZTigers of Germany boasts of deploying 3, 000 testers in the UK alone.
"We help you get verified reviews from real people.
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