Big Tech Devours a Booming $1.2 Trillion Ad Market

Global ad spending is set to surge to nearly $1.2 trillion in 2025, but the growth overwhelmingly benefits a few tech giants. A new WARC study reveals an industry operating in its own financial orbit, disconnected from the wider economy and consolidating power within a closed ecosystem.

• A market on fire: The expansion is projected to hit $1.4 trillion by 2027, a figure that will have doubled since the pandemic downturn. That breaks down to about $150 for every person on the planet.

• The flywheel effect: Alphabet, Amazon, and Meta are projected to capture nearly 59% of the ad market (ex-China) by 2027, fueled by a "self-reinforcing flywheel" of massive R&D spending. Take Meta, for example: the company plows roughly 30% of its quarterly earnings back into products like Reels and Advantage+, creating a feedback loop that pulls in ever more ad dollars.

• The open web's winter: This closed ecosystem is having a chilling effect on the open web, as independent publishers feel the squeeze. In a telling sign of the times, even Google’s own Display Network—the world's largest—is on track for its third consecutive year of declining revenue.

This two-speed system shows no signs of slowing. Major events like the FIFA World Cup and U.S. midterm elections are set to pour even more fuel on the fire for the dominant platforms. The ad boom is happening while linear media gets left behind. At the same time, experts note that shrinking "fee layers" in the ad-tech world mean more of every dollar now flows directly to the major platforms, further boosting their revenue even when total spending is flat.