Which Amazon agencies deliver strong results and are worth their retainer fees?

Members recommend a handful of agencies with proven track records on Amazon campaigns. **Fine Wine Cellars (FWC)** is mentioned as delivering good results versus investment, with members reporting it's an easy relationship to manage. **This Is Unicorn** has experience managing Amazon advertising campaigns, though one member noted they recently switched away from them to **Wavemaker** and were willing to share more detail separately. Members suggest asking for direct introductions rather than cold outreach—those with positive experiences are happy to facilitate intros. One member also flagged **Big River** as an option worth exploring. Import-based businesses may find their importer already manages Amazon ads as part of their service.