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Google Killed the Sandbox — The Open Internet is Next

Our VP, Product explains how Google’s retreat from Privacy Sandbox signals a deeper shift that puts the open internet at a critical crossroads.

By Lior Charka - VP, Product, Teads
December 10, 2025

I might be showing my age by saying this, but remember Y2K panic? They said planes would fall from the sky, banks would erase entire savings accounts, and the power grid would spontaneously combust. But that never happened. We woke up on January 1st, 2000, and it was just another day. The cookie apocalypse was supposed to be digital advertising’s Y2K: a dramatic end of an era. Like Y2K, the predicted total collapse of ad targeting never quite arrived as promised.

But unlike Y2K, this moment still matters. For CMOs, publishers, and programmatic traders, Google’s ho-hum announcement that most of the Privacy Sandbox will be retired marks another major power shift in the media economy.

Google’s Strategy: From Directory to Destination

Google didn’t kill Privacy Sandbox because they thought privacy didn’t matter anymore, but because network revenue has been declining year-over-year, while Search and YouTube (its closed-loop ecosystems) continue to drive massive profits. Privacy Sandbox was a costly, regulatory-driven patch for a legacy business with low ROI. The economics never made sense.

Meanwhile, Google’s AI ecosystem is booming. AI Overviews reach 2 billion users. AI Mode sees 75 million daily active users. Gemini now has 650 million monthly active users. Those numbers don’t just signal success; they reveal Google’s new center of gravity.

By killing Sandbox, Google stops pretending to “fix” the open internet and focuses on absorbing it. Its AI doesn’t just organize information, it owns it. Google’s long-term strategy is clear: to be the destination, not the directory.

The Fallout: Publishers Lose Their Partner

While the battle for user attention rages, AI is fundamentally rewiring how users consume information. Why click a link when the answer is already synthesized at the top of the page? Social platforms began siphoning traffic years ago. AI accelerates that decline: fewer clicks, smaller ad inventories, lower visibility.

Google’s AI is now feeding on the open internet, repackaging publishers’ content as its own product. Just as it was exposed during the Google AdTech trial, Google is continuing the path of pure extraction from publishers. Only this time it’s content in, engagement out.

What Publishers Should Do

Publishers can’t wait for Google to change course. The next chapter of the open internet depends on independent adaptation. There’s a lot of innovation to be had, and both publishers and their partners can work together to deliver.

  1. Differentiate or Disappear: Build an editorial voice that AI can’t mimic — investigative, opinionated, local, or deeply human.
  2. Own the Audience: Shift from borrowed traffic to first-party data, subscriptions, and direct relationships.
  3. Demand Fair Value: Treat content as licensed input for AI models. The future may depend on micro-transactions and data tolls, not ad impressions.
  4. Use AI, Don’t Fear It: Build recommendation tools and personalization engines to compete on relevance, not reach.

The Bigger Picture

This isn’t about cookies or privacy anymore; it’s about control of information and attention. The open internet, once defined by interoperability, is fragmenting into walled gardens optimized for retention, not discovery.

Google’s move signals the end of one era and the beginning of another: a digital landscape where privacy reforms paved the road for consolidation and more wins for walled gardens.  For publishers, the lesson is simple: the era of relying on Google for both traffic and monetization is rapidly ending. The next phase won’t be about cookies or privacy frameworks – it will be about access to information itself.