Is Big Tech Creating a National Security Crisis? Pentagon Says U.S. Troops Were Targeted Using Ad Data

Advertising has quietly become the economic engine powering much of the modern internet. For years, investors viewed digital ads as a simple growth story — more users, more engagement, more revenue. But what happens when the same data used to sell sneakers and streaming subscriptions can also be used to track American troops?

That question is no longer theoretical. According to a Reuters report, the Pentagon warned that hostile actors are purchasing commercial location data and using it to target U.S. military personnel. TechCrunch separately reported that Sen. Ron Wyden called the advertising ecosystem “a national security threat” because of how much sensitive user data is circulating through data brokers and ad exchanges.

For investors, this is bigger than another privacy debate. It strikes at the heart of how some of the world’s largest technology companies make money.

The Ad Economy Became Too Big to Ignore

Digital advertising is no longer confined to search engines and social media feeds. It has expanded into retail, streaming, connected TVs, and mobile apps — essentially anywhere consumers spend time online.

Here’s what the numbers tell us:

Alphabet and Meta remain the giants. But surprisingly, Walmart and Netflix may tell the more important story. These companies are proving that advertising has evolved into a high-margin revenue layer that can be added onto almost any digital platform.

Walmart’s advertising business generated roughly $6.4 billion last year and grew 41% domestically year over year. Netflix, meanwhile, doubled ad-tier membership growth in 2025 and increasingly positions advertising as a major long-term profit driver. It expects ad revenue to double again in 2026.

Why is ad revenue so attractive? Margins. A retailer may earn single-digit operating margins selling groceries. Selling targeted ads against customer shopping behavior can generate margins closer to software businesses.

That incentive explains why companies collect so much behavioral data.

The Same Algorithms Driving Engagement Also Collect Sensitive Data

Most consumers understand that digital platforms track clicks, searches, and viewing habits. Fewer realize how extensive the ecosystem has become.

Modern advertising systems collect location histories, app usage, device identifiers, browsing patterns, and purchasing behavior. Algorithms then use that data to keep users engaged and improve ad targeting.

Companies argue this improves user experience. In many cases, it does. Relevant recommendations help platforms retain users and advertisers spend more efficiently.

Granted, privacy advocates have warned for years that this system created risks. Apple’s (NASDAQ:AAPL) App Tracking Transparency changes in 2021 already forced Meta and other companies to adjust their data collection practices after billions in lost ad revenue.

Now the concern has shifted from consumer privacy to national security. According to Reuters, Pentagon officials warned that commercially available data could reveal troop movements, military routines, and sensitive facility locations. In other words, hostile governments may not need sophisticated espionage programs if they can simply buy data from brokers participating in the ad ecosystem.

What This Could Mean for Big Tech Investors

Investors should pay close attention because Washington has historically moved slowly on privacy issues — until national security becomes involved. Once that happens, regulation tends to accelerate.

Meta already faces scrutiny in the U.S. and Europe over data collection practices. Alphabet continues battling antitrust and advertising-market investigations. Now lawmakers may have a bipartisan justification for imposing tighter controls on location tracking and data sharing.

That said, investors should avoid assuming this destroys the ad business overnight. Advertising remains one of the most effective business models ever created. Alphabet generated over $64 billion in free cash flow over the past 12 months. Meta produced roughly $45 billion. Those cash flows fund AI infrastructure, buybacks, and future growth initiatives.

Regardless, the risk is more likely margin pressure than existential collapse. Compliance costs could rise. Data targeting may become less precise. Some tracking practices could disappear altogether. Smaller ad-tech firms and data brokers may face the greatest pressure because they lack the scale and legal resources of the largest platforms.

In short, the digital advertising industry may be entering its next phase — one where national security matters as much as clicks and conversions.

Key Takeaway

For years, the biggest debate around ad tech centered on privacy. The Pentagon’s warning suggests the stakes are now much higher.

Smart investors should recognize two realities at once. First, advertising remains one of the most profitable business models in the market. Second, the very data making those profits possible is drawing scrutiny from lawmakers, regulators, and defense officials.

In the end, the companies most likely to win may be those with the scale to adapt — firms like Alphabet, Meta Platforms, and Amazon — while smaller ad-tech players could struggle under tighter rules.

The ad economy is not disappearing. But the era of unrestricted data collection may be ending.