Years after The Guardian exposed programmatic revenue loss, publishers remain squeezed by hidden fees and opaque trading. Limelight’s James Macdonald explains why transparency is still out of reach.
For publishers relying on programmatic advertising, the promise of efficient revenue remains elusive. Nearly a decade after The Guardian revealed that only a fraction of programmatic ad spend reached its newsroom, the core issues persist. James Macdonald, co-founder and CRO of Limelight, says the fundamental structure of the programmatic supply chain continues to drain publisher earnings.
Macdonald argues that the problem is not simply technical. Instead, he points to a system built on misaligned incentives and a lack of transparency between buyers and sellers. He notes that too much revenue is lost to fees, intermediaries, duplicated auctions, and unclear trading paths. The challenge for publishers is no longer about generating more impressions, but about retaining more of the money those impressions should deliver.
The programmatic ecosystem is crowded with intermediaries—DSPs, SSPs, DMPs, and various data and verification layers—all taking a share of the advertiser’s budget before it reaches the publisher. While some players add value, Macdonald says many inefficiencies are tied to the ongoing transparency gap. He believes that if publishers had clear insight into where revenue is diverted and could influence who gets paid and for what, the market would be more balanced.
Recent events highlight the ongoing struggle. In February 2026, Dentsu and WPP suspended their relationships with The Trade Desk, citing concerns about hidden costs and limited fee visibility. This move underscored that even major buyers often lack full visibility into programmatic money flows. For publishers, who sit at the supply end of a chain shaped by buy-side priorities, the disadvantage is even greater.
Macdonald defines true transparency as granular data on where inventory is traded, how impressions are packaged, what fees are applied at each stage, and the ability to investigate delivery when performance issues arise. He says publishers need to move beyond surface-level reporting and gain actionable visibility into their programmatic performance. This includes custom reporting tailored to business needs and the ability to automate insights for better decision-making.
The stakes are rising as AI-generated traffic and invalid traffic filtering become more critical. Without detailed visibility into how inventory is traded, publishers are poorly positioned to spot where value is lost or where fraud enters the chain. Macdonald maintains that publishers cannot solve these challenges by optimizing within current arrangements. Relying on a handful of platforms to monetize inventory limits their ability to test, optimize, and understand the true value of their impressions.
He suggests that the right partner should offer transparency, automation, and flexibility, enabling publishers to scale efficiently while maintaining control over their monetization strategy. However, Macdonald acknowledges the irony that solving problems caused by opaque intermediaries often means trusting new partners. He believes the difference lies in the quality of the relationship and the level of visibility provided.
Publishers are advised to seek intuitive, user-friendly platforms that integrate with existing systems, require minimal operational overhead, and offer advanced automation. For ad-funded publishers, Macdonald says, traffic remains the key to revenue, and diversifying traffic sources is essential. The challenge is reliably assessing partner quality in advance, given the history of programmatic partners making similar promises.
Ultimately, Macdonald frames the issue as a structural imbalance: publisher revenue leakage is not just a technical inefficiency, but the result of a system where one side holds more information and leverages that asymmetry for commercial gain. This echoes findings from recent industry reports, such as those discussed in analysis of direct news traffic and subscription trends, which highlight the ongoing challenges publishers face in controlling their digital revenue streams.
