LONDON, UK – 23 April 2026 — Pubstack, the leading supply intelligence platform for digital publishers, today announces the launch of Spark for Publishers — a new supply intelligence layer designed to help publishers reclaim lost value in programmatic advertising.

Programmatic broke publisher value. Spark fixes it.

Over the past decade, the buy side has built powerful decisioning systems fueled by data, signals, and algorithms. Meanwhile, on the sell side, publisher inventory has become increasingly commoditised — flattened, indistinguishable, and undervalued.

Why? Because the data needed to differentiate that inventory is fragmented, diluted, or captured by intermediaries.

The result: publishers create premium experiences but struggle to capture their true value.

The problem isn’t demand. It’s how supply is presented.

Today’s programmatic ecosystem is saturated with billions of bid requests. SSPs and DSPs are forced to throttle traffic to protect their infrastructure and economics. This means a significant share of publisher impressions are destroyed (throttled).

Publishers often respond by sending more requests, making the problem worse.

More supply doesn’t drive more revenue. Better supply does.

Introducing Spark: sell less, earn more

Spark for Publishers flips the model.

Instead of pushing more inventory into the market, Spark enables publishers to curate, structure, and signal their inventory so that buyers can understand it — and value it.

Each impression is enriched and packaged using real-time signals, making it decision-ready for buyer algorithms. Spark finds the right buyer for each high value impression. The result:

• More impressions evaluated
• Better demand matching
• Higher CPMs
• Stronger win rates

In short: sell fewer impressions, but sell more of what matters — at a higher price.

How it works

Spark introduces a new supply intelligence layer that sits on top of existing monetisation stacks and focuses on three key areas:

• Signal-based packaging — inventory is structured and enriched with actionable signals, making it identifiable and valuable to buyers
• Traffic shaping — reduces bid throttling by sending only high-quality, high-probability impressions into the market
• Curated deal creation — builds unique, signal-driven deals based on real-time supply-side data such as engagement, ad pressure, and screen exclusivity

This ensures that more of a publisher’s inventory is actually seen, evaluated, and purchased, resulting in higher revenues for the publisher.

Bringing decisioning back to the sell side

For years, decisioning power has lived almost entirely on the buy side. Publishers were sending inventory into the market without control over how it was interpreted or valued.

Spark changes that. It gives publishers the ability to structure and signal their inventory in a way that buyer algorithms can act on — effectively bringing decisioning back to the sell side.

Hervé Brunet, CEO at Pubstack, said:
“We’re entering a new phase in programmatic — one where supply becomes intelligent. With Spark, publishers finally gain access to the kind of decision infrastructure that has long existed on the buy side.

This is about more than optimisation. It’s about rebalancing the ecosystem — giving publishers the tools to capture their true value.”

Discover Spark for Publishers here.