For no apparent reason, some brands that provide electronic devices have started to disappear from Amazon. Names like Aukey, Mpow, and RavPower, which is responsible for providing electronic gadgets, are examples that are no longer part of the platform.

But now the mystery has been exposed and Amazon has revealed that it has permanently banned 600 Chinese brands that have violated the online sales police with fraudulent reviews.

Amazon bans 600 Chinese brands for violating online selling rules
According to the information revealed by Amazon to the site the edgeThe platform has banned more than 600 Chinese brands in 3,000 different seller accounts.  The reason is that these brands violated Amazon's online sales policy due to fraudulent reviews.
This information justifies the sudden disappearance from the platform of some names of tool providers, such as Aukey, Mpow, RavPower, Vava, TaoTronics and Choetech.  But that was only a small part of what was to come.
All brands were counted after 5 months of 'cleaning'.  According to an Amazon spokesperson, these 600 brands were banned because they intentionally, repeatedly, and significantly violated Amazon's policies regarding review rules.

This stance on the platform started when companies like RavPower started offering gift cards in exchange for ratings for their brand.
according to The Wall Street JournalThe company then offered vouchers worth $35 (about 30 euros) to rate a product sold directly by Amazon.

After the story of my fake review, the listings for the original RAVPower electronics brand from Amazon vanished.
The company offered $35 gift cards for reviews about a product sold directly by Amazon itself.  RAVPower acted as the wholesaler on that list.https://t.co/6nazZZ5Wtb pic.twitter.com/znp9u48YHV
- Nick Nguyen (@nicnguyen) June 16, 2021

Therefore, the goal of these brands was to give a false perception that their products have positive reviews in the online store.  This will increase people's confidence and purchase of those same products.
Read the full Amazon version:

Amazon strives to build a great in-store experience so customers can shop with confidence and allow sellers to expand their business through healthy competition.  Customers rely on the accuracy and validity of product reviews to make informed purchasing decisions, and we have clear policies for reviewers and sales partners that prohibit the misuse of our community resources.  We suspend, ban and take legal action against those who violate these policies, wherever they are.
We will continue to improve abuse detection and enforcement action against hackers, including those who knowingly engage in multiple and repeated violations of the Policy, including the abuse review.  We are confident that the steps we take are in the best interests of our customers, as well as the honest dealings that make up the vast majority of our global sales community.