Seems her main complaint is that Amazon is enabling the amateur reviewers to break the embargo and get their pans up in a prominent way, while the folks who've actually signed on to embargo agreements (is that a thing?) have to wait. The pre-release reviews end up on top.

Publishers who care about these things could decline to release advance copies through Vine. But aside from the final Harry Potter book, who has ever fussed over embargo dates for a book review?