# The Amazon PPC DST Bug Costing You 15 Percent ROAS

Page: https://stenobird.com/podcast/performance-marketing-with-fexingo-paid-ads-roas-and-direct-response-conversations-7871641/the-amazon-ppc-dst-bug-costing-you-15-percent-roas
Text version: https://stenobird.com/podcast/performance-marketing-with-fexingo-paid-ads-roas-and-direct-response-conversations-7871641/the-amazon-ppc-dst-bug-costing-you-15-percent-roas.md
Podcast: [Performance Marketing with Fexingo: Paid Ads, ROAS, and Direct Response Conversations](https://stenobird.com/podcast/performance-marketing-with-fexingo-paid-ads-roas-and-direct-response-conversations-7871641)
Published: 2026-06-08T17:27:09+00:00
Episode link: https://audio.fexingo.com/business/performance-marketing/episode-0039.mp3
Audio file: https://audio.fexingo.com/business/performance-marketing/episode-0039.mp3
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JSON: https://stenobird.com/v1/public/podcasts/performance-marketing-with-fexingo-paid-ads-roas-and-direct-response-conversations-7871641/episodes/the-amazon-ppc-dst-bug-costing-you-15-percent-roas
Duration seconds: 606

## Resource

Lucas and Luna uncover a silent ROAS killer inside Amazon PPC: the campaign-level dynamic bidding setting that Amazon quietly defaults to 'down only' on certain new campaigns. Lucas explains how Amazon's 'dynamic bids down only' logic actually over-adjusts on high-converting placements, leaving advertisers paying more for traffic that would have converted anyway. Luna brings data showing a 15-year-old ecommerce brand that recovered 14.8% ROAS just by switching to 'dynamic bids up and down' and lowering their placement multiplier. They walk through the math, the auction mechanics, and why most advertisers never check that dropdown. Includes the 'buy me a coffee' donation segment mid-conversation. #AmazonPPC #DynamicBidding #ROAS #PPCMistakes #PaidAds #Ecommerce #AmazonAds #BidStrategy #AdOptimization #PerformanceMarketing #Marketing #Business #AmazonSellers #FexingoBusiness #BusinessPodcast #DigitalAdvertising #SponsoredProducts #AdSpendWaste Keep every episode free: buymeacoffee.com/fexingo

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## Transcript

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