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Apple's iOS update cuts The Trade Desk from Safari ads, Whoop's marketing boom triggered a 300,000-unit demand crisis, and German cross-border sellers face rising costs.
Apple just blocked The Trade Desk from serving ads on Safari — and peak season is weeks away. Plus, Whoop nearly broke its supply chain by growing too fast.
In this episode:
The Digital Commerce Daily is a concise briefing for ecommerce, retail media and digital commerce professionals, hosted by Marco & Klara. New episode every day.
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Also from Marco & Klara: The FMCG Marketing Daily · The Health Marketing Daily
Your 8-minute briefing on the platforms, players, and profits driving digital commerce today. Hosted by Marco and Klara.
Marco: Good morning — we've got a packed one for you today.
Klara: Apple is quietly breaking a major ad channel, and performance marketers need to know about it.
Marco: Then we're looking at what happened when Whoop's marketing worked almost too well.
Klara: And a new study on cross-border selling — with some uncomfortable numbers for German merchants specifically.
Marco: Let's get into it.
Marco: Apple just blocked one of the biggest independent ad-buying platforms from serving ads on Safari — and it's a bigger deal than it sounds.
Klara: Let's back up for a second. Programmatic advertising is the automated system that lets brands buy ad space across thousands of websites at once. The Trade Desk is one of the most widely used tools for doing exactly that — it's independent, meaning it doesn't belong to Google or Meta. For brands running upper-funnel campaigns — the kind designed to reach new customers who've never heard of you — programmatic on Safari has been a meaningful slice of that reach.
Marco: Now Apple's latest iOS update is actively blocking The Trade Desk from serving ads in Safari. Not limiting them. Blocking them. That cuts off a real chunk of available ad inventory — the pool of ad spaces brands can actually buy — overnight. Safari has a strong user base across Europe, particularly on iPhone and Mac, so this isn't a marginal loss. If you're running prospecting campaigns and a solid portion of your Safari traffic just went dark, you'll see it in your reach numbers.
Klara: What troubles me here is the timing. We're heading into the autumn push before peak season. Brands don't want to be rethinking their channel mix in October. This forces that conversation whether they're ready or not.
Marco: My take is starker. Apple is systematically tightening control over its platform, and every time they do, independent ad tech takes a hit. Brands that built their prospecting strategy around open programmatic need to treat this as a structural shift — not a temporary glitch. Review your channel mix now.
Klara: I'd add a note of caution though — we don't yet know the full scale of the impact. It may vary by campaign type and region. Worth monitoring your data closely before making wholesale changes.
Marco: Agreed. Watch the numbers, but don't wait for them to get bad before you act. Now, our second story today —
Marco: Whoop — the fitness wearable brand — just had its best marketing year ever, and it nearly broke them.
Klara: So Whoop started out positioned squarely at elite athletes. Professional sports teams, performance-obsessed gym regulars, that kind of audience. That's a loyal crowd but a small one. So they made a deliberate shift — repointing their marketing at everyday consumers who just want to track their health and sleep better.
Marco: The result was 85% membership growth in a single year. That's not a rounding error — that's almost doubling your customer base. But here's what nobody on the marketing team had fully planned for: a surprise order came in for 300,000 units over the holiday period. Nobody saw it coming. The supply chain — the whole production and delivery operation — wasn't set up to handle it.
Klara: And that's the part of this story I keep coming back to. Marketing did its job brilliantly. The campaigns worked. The audience expanded. But the operational side of the business — manufacturing capacity, inventory planning, supplier relationships — hadn't kept pace with what the marketing was promising to customers.
Marco: This is a really common pattern in fast-growing direct-to-consumer brands. The marketing engine accelerates faster than the warehouse can keep up. You sell the dream before you've secured the stock.
Klara: I'd push back slightly on blaming marketing though. Demand planning is genuinely hard when you're entering a new audience segment. The forecasting models are built on historical data from a totally different customer base. You're flying partly blind.
Marco: Fair — but that's exactly the point. If you know your models are unreliable because you've shifted audience, you build in bigger safety stock buffers before peak season, not after.
Klara: Sound advice for any brand heading into Q4 right now.
Marco: Our third and final story today —
Marco: A new study out of Germany has some uncomfortable numbers for brands that think international selling is a growth shortcut.
Klara: For context — cross-border ecommerce means selling your products into other countries, not just your home market. Germany is one of the most important markets in Europe, so German sellers tend to be a reasonable indicator of broader European trends. And for years, the pitch has been: go international, unlock new revenue. What this study is saying is that the maths is getting harder.
Marco: The headline number is 59%. That's the share of German cross-border sellers who say international trade is costing them more year on year. The culprits are pretty consistent across the board — marketplace fees, the logistics complexity of shipping across borders, and compliance costs. Meaning the tax registrations, product regulations, and legal requirements that differ country by country.
Klara: What I find most striking is the finding about marketplace infrastructure. Sellers who lean into the native tools that platforms like Amazon or Zalando provide — their built-in fulfilment, their localisation features, their payment processing — are outperforming sellers who try to manage cross-border operations on their own. Rolling your own international setup sounds empowering. The data says it's expensive.
Marco: And for UK and European brands looking at entering the DACH region — Germany, Austria, Switzerland — this reframes the question. You're not just solving a logistics problem. You're solving a margin problem from day one. The brands winning internationally aren't necessarily the ones with the most sophisticated independent setups. They're the ones using the tools the marketplace already built.
Klara: I'd nuance that slightly. Relying entirely on marketplace infrastructure does create dependency — the fees that are killing margins today are the same fees those platforms set unilaterally. There's a real tension between efficiency now and resilience later.
Marco: Both things can be true. Use the rails that exist — but don't mistake convenience for control.
Marco: Today's through-line is simple — every growth story has a hidden cost, and the brands that survive are the ones who spot it before it surprises them.
Klara: So pick one assumption driving your current strategy — about reach, demand, or margins — and ask yourself what you'd do if it stopped being true.