No responsible book marketing agency for authors can guarantee sales, reviews, rankings, advertising profitability, or bestseller status.
Results depend on the book, cover, description, pricing, audience demand, competition, campaign budget, targeting, timing, and reader response.
KDP advises authors to monitor third-party promotional tactics, avoid services that guarantee a return on investment, and ensure campaigns do not manipulate Kindle programmes or purchasing activity.
Professional support can improve campaign planning, targeting, messaging, reporting, and decision-making, but it cannot control how readers or Amazon respond.