It's so frustrating to spend weeks writing a book, designing the perfect cover in Canva, and then watching your daily budget evaporate on Amazon Ads with zero sales to show for it. I was losing money on clicks until I realized my targeting was completely wrong. I stopped bidding on highly competitive keywords and deployed 'The Quiet Prospector' strategy. I used Igor's clustering method to find niche anomalies with BSRs around 30,000 but zero reviews. The prospector silently identifies these hidden gaps so my books rank organically without me having to bleed cash on PPC. Are you guys struggling more with getting the initial reviews, or keeping ACOS profitable?