In 1995, there were 124,000 travel agents in the United States. They controlled access to airline inventory through proprietary GDS systems like Sabre and Apollo. They had "relationships" with hotels. They understood the complex fare rules. They provided "expert guidance" through the booking process. Customers couldn't possibly navigate travel planning without them.

Sound familiar? Replace "GDS systems" with "DSP platforms," "hotels" with "media vendors," and "fare rules" with "programmatic buying," and you've described exactly how too many media agencies position themselves today.

By 2000, Expedia existed. By 2005, half the travel agents were gone. By 2010, the only survivors were luxury specialists handling $50,000 African safaris or corporate travel managers dealing with enterprise complexity. Everyone else? They became a Wikipedia entry about extinct professions.

The pattern is so precise it's eerie. Travel agents said customers needed their expertise. Customers decided that clicking "book now" required all the expertise they needed. Travel agents warned about the complexity of international bookings. Customers figured out that booking flights to Tokyo wasn't rocket science. Travel agents emphasised their vendor relationships. Customers realised airlines would rather sell direct anyway.

On the same principle, Dell Technologies is moving $600 million in annual media spending in-house, previously managed by WPP, in a phased rollout that started in Latin America and will reach global completion within 12 months.

Brands have been bringing creative in-house for a decade with varying degrees of success (Kendall Jenner Pepsi anyone?). They've in-housed digital marketing, search, content production, social media management. Agencies survived all of it by retreating to their fortress: media buying. The one thing that required scale, relationships, and complexity that brands couldn't efficiently replicate. When media buying, the most profitable, defensible agency service, can be done better internally, the agency model is in trouble.

Why Media Buying Was Supposed to Be Different

Agencies have watched brands in-house for years without real panic. The defensive logic seemed unassailable:

  • Scale advantages: Agencies buy billions in media, securing 15-20% better rates than any single brand could negotiate

  • Platform relationships: Decades-deep connections with media vendors that can't be replicated

  • Technical complexity: Programmatic ecosystems requiring armies of specialists

  • Resource intensity: Global campaigns need hundreds of people across time zones

  • Risk management: Expertise in fraud detection, brand safety, viewability that protects client investments

Media buying wasn't just another agency service, is was the one with hard, quantifiable value. Agencies could literally show clients: "We save you more in media rates than you pay us in fees." It was the profit centre that subsidised everything else.

When Kristen Nolte, Dell's SVP of Global Consumer Marketing, and Briana O'Dea, Director of Global Media Campaign Strategy, presented their in-housing strategy at Cannes Lions this year, they revealed something telling. They didn't talk about cost savings first. They talked about "faster market response" and "better integration of sales and marketing."

Translation: We can book direct now.

But here's what makes this moment different from every previous in-housing wave. Three forces converged to make the impossible suddenly inevitable:

Platform Self-Service Revolution:

Google and Meta spent five years making their platforms enterprise-friendly. P-Max and Advantage+ aren't tools, they're agency replacements. The platforms want direct relationships badly enough they've eliminated every friction point that once required agency mediation.

AI Eliminates Complexity:

Previous media in-housing would have required Dell to hire hundreds of specialists. Now, AI handles the complexity. One strategist with AI tools replaces ten media planners. The "hundreds of people" WPP needed becomes Dell's "dozens" not through efficiency but through automation.

The Scale Myth Collapsed:

Agencies claimed their billions in aggregate buying power secured better rates. But platforms increasingly use auction-based pricing where scale doesn't matter. Moreover, Dell's $600M direct spend gives them more leverage than being 1% of WPP's aggregate buying power. They're not a small fish in WPP's big pond, they're a whale dealing direct.

The Technology Pivot That Should Buy Time

There's one route that can postpone this extinction timeline for agencies, perhaps long enough to reinvent sources of profit. Agencies clinging to the pricing scale advantage ("we buy media 15% cheaper") are defending yesterday's war.

The survivors will pivot from price aggregation to technology aggregation. Instead of pooling buying power, they'll pool technology investment. A single brand can't justify spending $100 million annually on proprietary AI models trained on billions of campaign interactions. But an agency managing $10 billion in media can amortise that investment across clients, delivering algorithmic advantages no in-house team can replicate. This is about buying it smarter. Day one, an in-house team using Google's tools is already behind an agency using proprietary technology trained on thousands of campaigns. The problem? Most agencies are still selling nineteenth-century scale advantages (bulk buying) in a twenty-first-century market that rewards technological superiority. But even this technology pivot only delays the inevitable, platforms will eventually democratise these capabilities too. Agencies have perhaps three years to build technology advantages before those advantages become platform features.

AI has made complexity manageable. Efficiency beats relationships when the efficiency gap becomes this large.The AI tools exist. The talent is available to hire. The only thing stopping you is inertia.

And inertia, as travel agents learned, is a luxury you can't afford when disruption moves this fast.

Brandflow is written by Justin Billingsley, who has spent his career on all three sides of the industry's table: senior client, global agency leader, technology founder. First published 29 September 2025 in the Brandflow newsletter on LinkedIn.