CTV's Missing Layer: Why Ad Decisioning Is the Next Stack War

Sir Martin Sorrell just put $10 million behind a thesis that most media planners haven’t fully confronted yet: connected TV has a decisioning problem, not a reach problem. That distinction is worth sitting with.

Olyzon’s Series A — led by S4S Ventures, the early-stage group Sorrell co-founded with Sanja Partalo — isn’t a bet on CTV’s growth trajectory. That story is already written. It’s a bet that the infrastructure layer sitting between a brand’s media budget and a viewer’s screen is still, in Sorrell’s words, missing a “coherent decisioning layer.” For marketing directors who’ve been told CTV is the premium channel they should be buying, that’s a structural problem worth understanding before the next planning cycle.

CTV Is Sold as a Channel. It Should Be Treated as a Stack Problem.

The typical CTV pitch goes something like this: premium inventory, lean-back attention, household-level targeting, measurable outcomes. All true. What gets glossed over is that executing against those promises requires your stack to do something it was never originally built to do — connect audience data, inventory signals, frequency logic, and outcome measurement across a fragmented ecosystem of streaming apps, smart TV operating systems, and SSPs that don’t always play nicely together.

What Olyzon is apparently building is an ad decisioning layer that sits above that fragmentation — a system that can make real-time decisions about which creative, at what frequency, against which audience segment, across which CTV surface. Think of it as the missing orchestration layer between your DMP and your CTV buys. Without something like it, brands are essentially buying CTV reach and hoping the outcomes follow. That’s not a media strategy — that’s optimism with a line item.

The Stack Audit CTV Forces You to Run

Here’s the uncomfortable question Sorrell’s investment implicitly raises: how many brands in Southeast Asia have the infrastructure to actually activate CTV intelligently, even if they bought the inventory today?

The honest answer, in most stacks I’ve seen, is not many. The region’s streaming landscape — spanning platforms like Viu, WeTV, Netflix, and YouTube on CTV — sits on top of measurement environments that are inconsistent at best. Cross-device identity resolution is harder here than in markets with higher data maturity. First-party data strategies are still being built. And the programmatic pipes connecting DSPs to CTV inventory are thinner and less standardised than their display or social equivalents.

Before adding CTV as a budget line, the stack audit should answer four questions: Do you have a clean, addressable first-party audience that can be onboarded to CTV DSPs? Do you have a frequency management solution that works across CTV and your other channels? Is your measurement framework capable of attributing CTV exposure to downstream outcomes — not just impressions? And does your creative production process support the longer-form, non-skippable formats that CTV actually rewards?

If two or more of those answers are no, more budget won’t fix the problem.

---

The Publisher Side of the Same Coin

Sorrell’s CTV bet lands in the same week that Digiday reported a notable shift in publisher revenue strategy: as Google search traffic continues to erode, a growing number of publishers are treating social platforms not as distribution channels but as direct revenue lines. The playbook is changing from “post to drive traffic back to the site” to “monetise where the audience actually is.”

This matters for the CTV conversation because it signals a broader infrastructure shift in how digital advertising value gets captured. Platforms — whether streaming services or social networks — are increasingly becoming closed ecosystems where the decisioning, the inventory, and the measurement all sit inside the same walled garden. The implication for brands: your stack needs to be interoperable enough to operate effectively inside those gardens while still maintaining the cross-channel visibility your leadership team needs to make budget decisions.

For Southeast Asian brands, this is particularly acute. The platform ecosystems here — Shopee, TikTok Shop, Grab, LINE — already operate with significant closed-loop infrastructure. CTV is arriving into a market that is, in some ways, already fluent in walled-garden dynamics. The risk is that brands optimise for each platform in isolation and end up with a stack that’s excellent at reporting inside each silo and blind across all of them.

What a Coherent CTV Stack Actually Looks Like

If you’re building toward CTV as a meaningful channel — not just a pilot — the decisioning layer Olyzon is targeting needs to be on your architecture roadmap, whether you use their product or build equivalent capability another way.

Practically, that means three things. First, identity infrastructure: a first-party data asset that can be matched against CTV inventory audiences, ideally through a clean room or direct publisher partnership rather than third-party segments you don’t control. Second, creative infrastructure: CTV rewards longer storytelling and punishes bad frequency management — your creative and media teams need to be aligned on this before the first dollar is spent. Third, measurement infrastructure: incremental reach measurement and brand lift studies are the minimum; outcome-based attribution tied to your CRM or commerce data is the goal.

The brands that will extract real value from CTV over the next two years are not the ones who buy it first. They’re the ones who build the decisioning layer first.

---

Key Takeaways

• Audit your stack’s decisioning, identity, and measurement capabilities before scaling CTV spend — reach without infrastructure is just expensive wallpaper.
• In Southeast Asia’s platform-heavy ecosystem, cross-channel visibility is as important as in-platform performance; build for both simultaneously.
• The CTV decisioning layer is becoming a competitive moat — brands that establish it now will have a structural advantage over those who try to retrofit it later.

Sorrell has backed a lot of infrastructure bets over a long career — some prescient, some premature. The Olyzon thesis feels more like the former. The question for brands isn’t whether CTV decisioning infrastructure matters. It’s whether your team is structured to build it before your competitors do — or whether you’re still debating whether CTV belongs in next year’s plan at all.

---

At grzzly, we work with marketing teams across Southeast Asia who’ve accumulated CTV and programmatic capabilities without the connective tissue to make them perform together. If your stack has the inventory access but not the decisioning clarity, that’s exactly the kind of audit we’re built for. Let’s talk