There is no shortcut around credibility. Not for authors, not for reviewers, not for the sites selling review packages. The second a paid review sounds templated enough to trigger suspicion, its marketing value starts collapsing.
This IndieReader AI fraud warning is useful because it does not stay abstract. It shows what was checked, what was found, and why authors should care before they quote a paid review anywhere public.
Editorial reviews still matter. They just matter less the minute authors start wondering whether a bot wrote them faster than a person could read the book.