One of my first long-term gigs was for an Amazon seller in the phone accessories niche. I had many days to day tasks (which we called marketing and PR - and I was the man behind the entire -y strategy) including:
I have created a Facebook group, which was called Amazon Reviewers. At its peak, this group had more than 1500 active members. What we did was super-simple, post a product, give a coupon code (which always left the customers with spare $1-2) it was a total bribe. We never got a negative review and around 300 positive reviews for a cheaper price than buying on F or any other place. We also cooperated with a larger group which asked for small donations of $50 to their PayPal, which brought us around 150 reviews for an iPhone case.
In each of the shipped orders, there was a card, which stated if you would do a video review of the product you would get the full amount refunded to your PayPal account. I stopped using this card, as it was against the ToS of Amazon, and there were many shares on Reddit regarding the same card, we created negative publicity.
Paying off YouTubers for $250-800 for a positive review, and yes, many famous channels did a positive review for our products. The smaller channels (up to 20K subs) asked for $50 or even did it for free.
Of course, this doesn’t work anymore as Amazon banned a lot of the reviewers from the groups that we had. However, that was one of the ways that we got great reviews, and sales at the same time.
Once we got bombarded with fake negative reviews, which I found a pattern to, and Amazon deleted them. The company gave me a great bonus - a Playstation 4 as a gift because I have done this. The always offered my gifts, bumps in salary, but I was super-humble as I didn’t realize what I have done for them. I was actually their most important employee. But yeah, I was just 17 at the time.
The quality of the screen protectors on Amazon is the same one as on Alibaba, eBay, Aliexpress, and similar websites. It’s just that sellers on Amazon, add their logo, a better package and resell the products. In many cases, the quality for Amazon is slightly better than on eBay though.
My bet for buying screen protectors and cases for my phone is always buying the official ones from big box technology retailers. Indeed, they cost a small fortune, but it’s totally worth it IMO.
https://www.youtube.com/watch?v=vOj-tRTbFfY - This video explains this “fake” review chain which you explained better.
I started my F career with Amazon reviews, back in the days when it was not against the ToS. It was a great business. That was the most popular way to get fake Amazon reviews back in 2014/2013.