How Podean & SWYM Eliminated “Silent Waste” and Increased ROAS by 53%
The challenge
Podean, a global marketplace agency running off-site retail media through Amazon DSP, faced a persistent but hard-to-detect issue: “silent waste.” Despite advanced audience targeting, bidding, and creative optimization, a significant share of spend flowed to high-bid, low-quality inventory.
This inefficiency originated upstream, within fragmented supply paths and limited visibility into inventory quality, making it difficult to diagnose or fix using standard DSP controls. As a result, even highly optimized campaigns were constrained by poor supply, suppressing performance and efficiency.
The solution
Podean partnered with SWYM to address inefficiencies at the source – before bids were placed. Using AI-driven supply shaping, SWYM applied real-time commerce signals (purchases, ROAS, and detailed page views) directly to bidstream decisioning.
SWYM dynamically scored incoming bid requests across domains, placements, SSPs, and devices – prioritizing inventory proven to drive outcomes while suppressing waste upstream. This created curated, high-quality supply paths for Podean to activate within Amazon DSP, without disrupting existing strategy, creative, or budget workflows.
The results
The results conclusively validated the team’s approach.
Performance Gains
Increase in ROAS
on purchase-focused Display campaigns
Lift in (DPVr%)
on consideration-focused Online Video campaigns
Brand Safety Improvements
Reduction in domains
consolidating spend onto higher-quality, more relevant environments
Supply Chain Simplification
Reduction in SSP paths
eliminating duplication and fragmentation
Cost Efficiency
Reduction in CPMs
confirming that gains were driven by smarter supply decisions - not increased bids or budgets
These results demonstrate that applying commerce signals at the supply layer – not just in post-bid optimization – can significantly improve performance, efficiency, and transparency in off-site retail media.