Brands Lose Half of Programmatic Ad Spend to Opaque Supply Chain
A landmark ISBA study reveals that only 51% of programmatic ad spend reaches publishers, while 15% remains completely unattributed in the complex tech supply chain.
A groundbreaking study by ISBA and PwC reveals that brands lose approximately half of their programmatic advertising investment before it reaches online publishers. The research, which maps the end-to-end programmatic supply chain for the first time ever, analyzes £100m in UK ad spend from major companies like Unilever, Tesco, and British Airways. It shows that publishers receive just 51% of the total advertiser investment, exposing a massive inefficiency in the digital advertising ecosystem.
The study identifies a troubling 15% of advertiser spend as completely unattributable to any player in the supply chain, creating what researchers call an "unknown delta." Of the money that does not reach publishers, 35% goes to identifiable intermediaries such as agencies, demand-side platforms (DSPs), and supply-side platforms (SSPs). However, this represents a best-case scenario because the analysis only covers disclosed programmatic models and excludes the notoriously opaque long-tail of ad tech.
The research process itself highlights the severe lack of transparency in the industry, as it takes advertisers and publishers nine months just to extract data from technology vendors. PwC partner Sam Tomlinson notes that while advertisers and publishers are willing to share their data, the intermediary tech platforms provide inconsistent and unrefined information. Previous independent experiments by outlets like The Guardian suggest the actual losses could be even worse, with publishers sometimes receiving as little as 30% of the original brand investment.