Prime Day Doesn't Create Loyal Customers. Your Targeting Does.
Every year, the same conversation happens in the weeks before Prime Day. Brands finalize deals, lock in budgets, and brace for the traffic surge. The metric everyone is watching is revenue — how much moved, how far above goal, how it compared to last year.
That's not the wrong question. It's just incomplete.
The brands that consistently get the most compounding value out of Prime Day aren't only measuring what they sold during the event. They're measuring who they acquired and what those customers did in the months after. The difference between those two lenses changes everything about how you invest before the event starts.
What the Data Actually Shows
GO tracked first-time purchases made during the Prime Day period across consumable and health brands, then monitored the repeat purchase behavior of those customers in the months that followed. The question we were trying to answer wasn't "did we hit our sales goal?" It was "how much did those customers generate after the event ended?"
The results validated what we suspected, and then some.
Prime Day customers generated 2x the revenue in repeat purchases over time compared to their initial transaction value. Each day of Prime Day drove as much long-term customer value as four regular days — both in immediate sales and in the downstream revenue those customers produced. And following the event, repeat revenue from Prime Day-acquired customers ultimately outpaced the initial NTB revenue entirely.
Those numbers are compelling. But here's what they don't tell you on their own: they assume you acquired the right customers in the first place.
The Part You Can't Afford to Miss
The brands that win Prime Day take a long-term approach to turning event shoppers into customers who keep buying long after the event ends. That distinction matters more than it might seem.
A customer acquired through a broad discount campaign — someone who showed up because they were hunting for the best deal in the category — behaves fundamentally differently from a customer acquired because your targeting identified them as in-market, behaviorally aligned with your product, and likely to replenish. The revenue data above reflects the second type of customer. It doesn't apply uniformly to the first.
According to Gartner, 64% of marketers find accurately targeting the correct customer segment a significant or moderate challenge. Prime Day magnifies that challenge because the traffic surge creates pressure to capture volume, and volume-chasing often comes at the expense of targeting precision.
The infrastructure that determines acquisition quality isn't built during the event. It's built in the weeks before it.
What Targeting Quality Actually Looks Like
For GO's brand partners, precise Prime Day targeting typically involves three layers working together before the event begins.
The first is a DSP prospecting-to-retargeting pool construction.
The retargeting audiences that perform during Prime Day are built from weeks of pre-event DSP prospecting — reaching shoppers who have demonstrated behavioral signals aligned with the brand's category. Brands using precise in-market, competitor, and lifestyle audience combinations within DSP have demonstrated strong NTB uplift — but that result depends on the quality of the audience definition, not just the presence of a DSP campaign.
The second is AMC audience segmentation.
Amazon Marketing Cloud allows GO to build custom audiences based on specific purchase and engagement signals — shoppers who searched the category but didn't convert, shoppers who viewed competitor ASINs, shoppers who previously bought adjacent products, etc. These segments identify high-intent prospects who are far more likely to become repeat customers than broad in-market audiences alone.
The third is Subscribe & Save readiness.
For consumable brands, the most valuable thing a Prime Day customer can do after their first purchase is enroll in SNS. That enrollment rate is directly influenced by how well-targeted the initial acquisition was — a deal-seeker who bought on discount has little reason to subscribe. A customer who genuinely needed the product and found it through precise targeting has every reason to.
The Metric Worth Watching
GO's data shows that repeat revenue from Prime Day customers outpaces the initial NTB revenue — but only when the acquisition was precise. The signal to watch post-Prime Day isn't event-day ROAS. It's whether the customers you acquired are coming back.
If they are, your targeting worked. If they aren't, the acquisition volume during the event is a weaker asset than the numbers suggest, and the place to look is the audience infrastructure that was in place before the starting gun.
Prime Day creates traffic. Your targeting determines who stays.
If the audience infrastructure that determines acquisition quality isn't built yet, there's still time, but the window before the event is closing. Let's make sure your brand is set up to acquire the customers worth keeping.