The Myth of The Modern Identity Graph

Over the last 10 years, we’ve gotten pretty good at connecting data to understand our customers. We’ve tracked how people behave on different devices, linked their actions, and built detailed profiles to see the full picture.

But here’s the problem—many of the tools we use are starting to fade. Cookies are almost gone. Mobile advertising IDs are becoming less useful. Even IP addresses aren’t reliable anymore because of VPNs and privacy settings. Phone numbers? They’re often fake or recycled.

Still, many of us keep adding data, thinking more connections will give us better results. But if the data is weak or outdated, we’re not learning much about real people. We’re just seeing a blurry outline.

What We’re Losing Along the Way

Let’s look at the common tools marketers rely on:

• Cookies: These are nearly gone. Today, over 85% of web traffic blocks third-party cookies.
• Mobile IDs (MAIDs): After Apple’s privacy updates, only 25% of users allow tracking. Android is doing the same.
• Phone numbers: Many are reused. A Princeton study found 66% of recycled numbers were still tied to past accounts—and some were even receiving private messages.
• IP addresses: One IP can belong to many users or devices. VPNs and changing networks make this signal messy.

These tools were never really meant to confirm someone’s identity long-term. Now that they’re weakening, we need something stronger that can beat identity graph limitations.

The Danger of Targeting “Shadows”

Marketers often target people based on what looks like a full profile. But sometimes, that profile isn’t tied to anyone real.

We’ve seen cases where 15% or more of an audience was made up of fake or temporary emails. These accounts got treated like real customers—offered deals, included in reports—when they weren’t even valid.

Why does this happen? Because many identity systems don’t check if the data is real. They just connect what’s there and assume it matters.

Why Email Still Stands Strong

In a world where many signals are fading, email is still reliable. People use it to log in, reset passwords, get order updates, and stay connected across platforms.

A real email address shows more than just contact info. It tells a story—how long someone’s had it, how often they use it, and how active they are.

Here’s why email is a strong signal:

• It lasts: Unlike cookies or device IDs, emails stay the same for years.
• It works everywhere: You’ll find it in CRMs, ecommerce sites, and customer service tools.
• It gives real insight: You can see if it’s tied to risky activity or if it fits well into a customer journey.

MIT research even shows that people return to the same email threads over months or years. That shows how email connects people across time.

Better Signals Lead to Better Results

Email marketing works—and the numbers prove it. The DMA says email gives back an average of $36 for every $1 spent, more than any other channel.

But that success doesn’t come from sending more emails. It comes from sending them to real, active people.

AtData has found that when you use email signals—like how old an inbox is or how active it’s been—you can:

• Cut down on fraud by 10% to 25%
• Lower bounce rates
• Improve engagement with past users

Best of all, email doesn’t rely on third-party data. It’s based on permission and real behavior. That makes it something you can count on, even as everything else changes.

Focus on Real Identity

We’re not saying to stop using your current tools. But we do need to ask better questions.

If we don’t check whether someone is real, we’re just making guesses. Good marketing starts with real connections—not just with data, but with people.

So if you want better results, focus on signals that last. Build your strategy around identity that’s real, not just what seems connected.

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