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.