Global Ad Spend Grew 8.6 Per Cent Last Year and the Holding Companies Still Shrank

There is a reasonable chance that the agency you hired did not do your work. Somewhere behind the logo on the invoice, a team you will never meet built the campaign, coded the emails or fixed the site.

Nital Shah runs one of those teams. Mavlers, which he co-founded, has more than 400 specialists delivering for agencies globally, and almost none of the brands on the receiving end know the company exists.

His argument is that this is not an execution business at all.

"What we actually sell is not the deliverable," he says. "It is the confidence that lets a partner put their name on work they never watched happen."

The squeeze that created the market

The pressure driving agencies towards each other is visible in the numbers, and it comes from two directions at once.

The Association of National Advertisers reports that 82 per cent of its members now run an in-house agency, up from 78 per cent in 2018. Routine work keeps moving back inside brands' own walls.

At the same time, the major platforms keep shipping AI tools for building and targeting campaigns, removing agencies from steps they used to own outright.

The result shows up in the only comparison that matters. Worldwide ad spending grew 8.6 per cent in 2025. The revenue of the big holding companies fell 1.2 per cent.

When the market expands and your share of it contracts anyway, you go looking for a cheaper way to deliver. For a growing number of agencies, the cheaper way is another agency.

A partner should never hear about a problem from their own client

What an invisible production partner is

Shah describes a recent arrangement plainly. A large creative agency needed to scale its SEO delivery across several markets and did not want to add headcount to do it. His team took the work on, it went out under the agency's name, and the agency's clients were never told.

That is a more exposed position than a conventional vendor relationship, in both directions.

"The whole arrangement only works if we never once make that agency look bad in front of a client we will never speak to," he says.

The supplier carries reputational risk it cannot observe. The agency has staked its client relationships on a team its clients have never heard of. Neither party can verify the other's conduct in the room where it matters, because neither is in that room.

The rule the whole thing runs on

Shah's operating principle is unglamorous and, in his telling, absolute. A partner should never hear about a problem from their own client.

Bad news travels from the supplier first. When it is awkward. When it is their fault.

The reasoning is a specific observation about how these relationships actually end. Partners rarely walk away over a deliverable that was merely average. They walk away over a surprise, because a surprise means they were in front of a client without the information they needed.

Looking back over the longest relationships his company has, Shah says none of them has a spotless record. They are the ones where bad news was delivered well, and the partner concluded they could still be trusted with the next thing.

Why it holds up when systems break

The final test is the one nobody controls. When something fails inside a client's platform, or their email system, or a piece of infrastructure belonging to none of the parties, the end client has no interest in whose name sits on which line of the contract.

They want to know that somebody is steering.

That is the actual product in a white-label arrangement, and it explains why the model is expanding while the industry above it contracts. The work has not disappeared, whatever the in-housing figures suggest. It has moved somewhere quieter, where it is performed by people the client will never be introduced to, under an agreement neither side can afford to have discussed.