Kilby Blades has an interesting angle on the plagiarism and ghostwriting issue: https://www.kilbyblades.com/blog/2019/2/19/everyones-missing-the-point-on-the-cristiane-serruya-story
It's another case of algorithms shaping what gets bought, and not necessarily to the benefit of readers or writers. A ghostwriting boom doesn't help you pick a book knowing what the author's style will be, and the current Amazon algorithm favours speed over quality.
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