Fakespot shuts down today after 9 years of detecting fake product reviews

I sell books on Amazon.com through their KDP Direct platform, and I have one book with two different covers; each is its own "book" in their catalog. FakeSpot repeatedly marked reviews I knew were valid as fake; I knew this based on the fact that the same reviewer reviewed the "other" book and that review was NOT flagged as fake. And this happened multiple times, and sometimes the wording of the two reviews were different. Further investigation showed FakeSpot had rather a poor reputation overall due to too many false positives. Good riddance, as far as I'm concerned.

That's interesting! Did you have any guesses as to what might have been setting it off to mark those reviews as false positives?

I have managed some Amazon product pages, which I know have never used fake reviews. Fakespot consistently had false positives for these items

It's just hard to build a blunt tool that doesn't occasionally whack honest users too

It is possible that that reviewer writes diverse reviews on random books so that the paid reviews it leaves have some cover.