Audience-First 90/10 Rule
Spend most growth effort acquiring an audience before optimizing conversion.
- Difficulty
- Easy
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- 99%
The rule distinguishes an acquisition constraint from a conversion constraint. When only a small audience reaches the business, marginal conversion improvements cannot create meaningful growth and may not be statistically reliable. The team should therefore spend about 90% of its attention gaining cheap, relevant access to an audience and only about 10% maintaining or improving conversion. Acquisition deserves the larger share because it depends on competitive external platforms, partnerships, media, and recommendation systems. Conversion is more controllable and can usually be improved later through product, messaging, and funnel changes. Once audience volume becomes substantial, the allocation can shift toward monetizing and retaining that demand.
Origin
Extracted from Marketing Against The Grain as Kip Bodner and Kieran Flanagan's stated allocation rule from building HubSpot's audience.
Core principles
- 01Acquisition is usually constrained by external channels and competition.
- 02Conversion is largely an internal optimization problem.
- 03A large relevant audience creates more strategic options than a highly optimized tiny funnel.
- 04Optimization matters after sufficient demand exists to measure and monetize.
How to run it
- 1
Diagnose the bottleneck
Determine whether growth is limited primarily by too few relevant people arriving or by many qualified people failing to convert.
Pro tip Use absolute qualified volume, not only percentage rates.
Watch out A high conversion rate on tiny traffic can conceal an acquisition crisis.
- 2
Protect a functional funnel
Ensure prospects can understand the offer and complete the intended conversion without major defects.
Pro tip Fix obvious breakage before deprioritizing conversion work.
Watch out Audience-first does not mean tolerating a nonfunctional buying experience.
- 3
Allocate 90/10
When audience is scarce, place roughly 90% of growth effort into acquisition and 10% into conversion maintenance.
Pro tip Treat the ratio as a prioritization heuristic rather than rigid accounting.
Watch out Do not apply it mechanically after acquisition is no longer the main constraint.
- 4
Expand audience access
Invest in channels, creators, partnerships, media, tools, and content that increase qualified reach.
Pro tip Prioritize repeatable access over isolated traffic spikes.
Watch out Raw reach from an irrelevant audience does not solve acquisition.
- 5
Rebalance at scale
Once traffic is large and relevant, increase conversion investment using reliable behavioral data.
Pro tip Reassess the bottleneck regularly as the system grows.
Watch out Continuing to ignore conversion after acquiring scale wastes valuable demand.
In the wild
A founder receiving one thousand monthly visits spends weeks testing button colors and minor landing-page copy. Applying the rule, the founder keeps a competent signup path but redirects most effort toward partnerships, useful content, and creator distribution until qualified traffic is large enough for conversion tests to matter.
→ Growth effort moves from marginal optimization to the binding acquisition constraint.
Common mistakes
Optimizing tiny samples
Small traffic volumes make conversion changes both low-impact and difficult to evaluate reliably.
Buying irrelevant reach
Audience volume only creates strategic value when the acquired people plausibly need the product.
Ignoring broken conversion
The rule prioritizes acquisition but does not excuse severe messaging, product, or checkout failures.
Is it for you?
Best for
It is best for startups and marketing teams with limited qualified traffic, weak distribution, or insufficient conversion data.
Not ideal for
It is not ideal for businesses already receiving substantial qualified demand but losing it through a clearly broken purchase or onboarding experience.
From the transcript
“we've spent 90% of our time talking about how to get access to an audience really cheaply, and about 10% of our time worried about…”
“most marketing teams spend that time in the exact inverse, right? They spend 90% of their time obsessed with the conversion rates, 10% about getting…”
“If you give me a large audience, I'll figure out conversion.”
From the episode
How to Build A World-Class Distribution Engine