This article in Publishers Weekly discusses the pros and cons of paid reviews and it’s a good read if you have written a book and now you want to promote it. When I say “paid reviews,” by the way, I’m talking about pro (and pricey) review services like Kirkus and Blueink, not $5 reviews on Fiverr.
For indie authors who have some room in their marketing budgets, paid book review services can be an appealing option. Reviews are a crucial part of a book’s marketing strategy. Whether they appear on the book’s jacket or on bookselling sites, reviews make a book seem more professional while giving potential buyers an idea of what it’s about (and whether or not they’ll like it).