Your Service Model Determines Which Marketing Channels Are Possible
Why custom work, deal size, and explainability quietly cap growth long before tactics matter
You’ve probably heard some version of this advice a hundred times:
“Niche down.”
“The riches are in the niches.”
“Focus and everything else gets easier.”
There’s truth in it. But it’s usually presented as a rule rather than what it actually is: a trade-off.
There isn’t one right way to build a service business.
You can absolutely build a successful business selling fully custom services to a broad range of clients. Plenty have done it.
I was reminded of that recently in a conversation with a founder running a dev agency doing about $5M in revenue a year. Fully custom work. Strong reputation. Smart team.
They’d grown almost entirely through referrals and outbound.
This business isn’t broken. It’s definitely working.
But the conversation also brought to light something most founders miss, especially solos and small agencies trying to grow:
The way the service is designed quietly determines which growth channels are even possible.
“Niche down” isn’t wrong. It’s just incomplete.
The problem with most “niche” advice isn’t the direction. It’s how confidently it’s delivered.
“Pick a niche” is treated like a moral imperative rather than what it actually is: a design decision with downstream consequences.
You can stay broad.
You can sell custom work.
You can build a great business that way.
You just need to understand the tradeoffs you’re accepting when you do.
Custom, broad, and successful still exists
That dev agency founder I spoke with is proof.
They build many different things for many different types of clients. Each project is custom. The value depends on context. Every sale requires explanation.
They’ve grown through relationships, reputation, and outbound.
That model works.
It just comes with constraints. And those constraints usually show up when they try to do marketing.
If every sale needs you, growth stays 1:1
Here’s the simplest way to think about what’s really going on:
Sales is mostly 1:1 communication.
Marketing is mostly 1:many communication.
(For simplicity here, I’m using “sales” to mean live, one-to-one conversations, and “marketing” to mean communication that reaches many people at once. In reality, the line can blur, but the distinction still matters.)
If every deal requires a tailored explanation, custom framing, and live context, then growth has to happen conversation by conversation.
In that conversation with the dev agency founder, I asked two basic questions:
What do you build for clients?
Him: “Anything.”
Who do you sell to?
Him: “Anyone.”
When what you sell changes from deal to deal, and who you sell to is broad, there is no single message that holds. Every buyer needs a different explanation. Every sale requires you to be in the room.
That choice locks you into 1:1 growth through sales channels, whether you realize it or not.
Marketing fails when the offer can’t be explained once
This is where most founders draw the wrong conclusion.
They try content.
They try paid ads.
They try SEO.
Nothing converts.
So they conclude: “Marketing doesn’t work for businesses like ours.”
But marketing didn’t fail.
Marketing requires something very specific: a message that can be explained once and understood by many. If the offer collapses under edge cases and exceptions, 1:many channels can’t do their job.
You can’t run effective marketing when:
The audience is undefined
The problem shifts with every sale
The offer changes every time
The value only makes sense after a long conversation
That’s an offer design problem. Not a channel problem.
Deal size determines how much inefficiency you can survive
Referrals, outbound, and networking all scale linearly.
Each new dollar of revenue requires another conversation, another relationship, another unit of effort. These channels work. They’re just effort-intensive.
This is why high-touch services businesses can still grow pretty large without traditional marketing.
Deal size does a lot of the work.
A custom dev agency that closes large projects can afford long sales cycles, extensive explanation, and relationship-driven growth. Each win absorbs a lot of inefficiency.
But that same model collapses at lower deal sizes.
If those 1:1 sales were worth $100 or even $1,000 per year, the math would break immediately. You’d hit a ceiling fast, no matter how strong your referrals were.
This is where marketing becomes a non-linear multiplier.
Marketing isn’t magic. It’s leverage. One explanation reaches many people. The effort compounds only when the offer is repeatable and understandable without you in the room.
Productization isn’t just about clarity or positioning. It’s about economics.
A large deal size can carry a linear model a long way.
A small deal size cannot.
Repeatable offers can unlock non-linear growth
At the other end of the spectrum, things look very different.
The offer is tight.
The audience is specific.
The problem is repeatable.
The value is clear without a sales call.
In that world, buyers can self-identify. Messaging holds across channels. Content, SEO, paid, partnerships, and inbound start to work because you’re no longer explaining something new every time.
Marketing becomes a multiplier instead of a tax.
This isn’t morally better. It’s just a different setup.
Generalist + custom means 1:1 channels by default
I had a similar conversation with a solo consultant recently.
He enjoys being a generalist. He likes custom work. He doesn’t want to niche down.
That’s a valid choice.
But he also doesn’t love outbound or networking. He’s introverted and would rather not spend his time doing 1:1 relationship-building.
That’s where the friction shows up.
If you choose generalist + custom, networking isn’t optional. It’s the channel your model requires. Disliking it doesn’t change the math.
You’re choosing growth mechanics, not tactics
You’re not really choosing between:
Custom vs. Productized
Niche vs. Generalist
You’re choosing:
Linear vs. Non-linear Growth
Which channels are available to you
How much explanation each sale requires
Your service design answers those questions whether you think about them or not.
There’s no universally correct model.
But you can’t have:
fully custom work
a broad audience
scalable 1:many marketing
all at the same time.
Growth isn’t capped by talent, hustle, or tools.
It’s capped by how explainable your service is without you in the room.
If you’re frustrated with the effectiveness of your marketing, it’s worth asking yourself a simple question:
How much of my business requires me to explain it live?