You've got stores that would include a $5-$20 coupon/gift card in the item in exchange for a positive review. Sure, this didn't 1:1 translate but if a user did it would look like a legitimate review.
You've got a plethora of LLMs out there just itching to GENERATE.
Then an expensive option I was suprised happened - I bought a Dyson clone vacuum cleaner off of Amazon. A few weeks later, the company emailed me and said 'We have a new model. Buy that one, leave a review, we'll refund the purchase'. So I did it. This happened about 10 more times in 2024. My outdoor shed is entirely stick vacuums.
Feel a bit dirty doing it but that's ok I've got 12 vacuums that can clean my conscience.
I think Fakespot would have difficulty with all 3 of these scenarios.