The Case for and Against Agentic Media Buying

Why It Matters

If agentic buying scales, it could reshape revenue flows between advertisers and publishers, but unchecked it may deepen opacity in an already complex digital‑ad ecosystem.

Key Takeaways

• Omnicom tests agent‑to‑agent buys to cut ad‑tech fees
• Trade Desk warns agentic models create fragmented micro‑networks
• Proponents say agents can push budget to premium inventory, raising CPMs
• Critics fear new opacity and loss of oversight without human control

Pulse Analysis

The programmatic advertising ecosystem has long wrestled with a bloated supply chain, hidden fees and diminishing returns for publishers. Recent tests by Omnicom’s holding company and peers such as Stagwell aim to replace traditional ad‑tech middlemen with AI‑driven agents that connect advertisers directly to a publisher’s ad server. By eliminating intermediaries, these agents promise to lower the "ad‑tech tax," improve data transparency and accelerate the flow of dollars to high‑quality, first‑party inventory.

Supporters highlight several strategic advantages. Direct agentic trades can command higher CPMs because premium, data‑rich placements become more accessible without the dilution of exchange inventory. AI‑powered optimization can execute bidding and performance adjustments at machine speed, freeing media planners to focus on strategy rather than manual execution. In theory, the technology could also enforce compliance standards, favoring ethical data sources and reducing wasteful retargeting, thereby improving overall campaign ROI.

However, the approach carries significant risks. The Trade Desk’s Jeff Green cautions that agentic buying may proliferate a maze of tiny buyer‑seller pairings, effectively spawning countless micro‑networks that obscure where ads run and what data fuels them. Without robust human oversight, advertisers could chase outcomes at any cost, eroding brand safety and regulatory compliance. Moreover, current pilots involve only modest budgets, suggesting the model is still far from the scale needed to meaningfully impact the open web’s broader value‑exchange challenges. Stakeholders must balance the lure of efficiency with the imperative for transparency and control.