building online growth that compounds
Most growth plans are really traffic plans, and traffic is rented. This is an argument for the other kind of growth: the kind built on things you own, where this month's work makes next month easier instead of resetting the meter to zero.
Somewhere in the past decade, growth and traffic became synonyms. I understand how it happened. Traffic is easy to buy, easy to chart, and it moves the moment you spend money on it, which makes it wonderfully reassuring to put in a board pack. But after fifteen years of sitting in growth reviews, I've noticed something uncomfortable: the businesses proudest of their session counts are often the most fragile underneath.
Here is the test I use. Imagine the marketing budget vanished tomorrow. Not trimmed. Gone. What would still be working for you in twelve months? For a surprising number of organisations the honest answer is almost nothing. The ads stop, the visitors stop, and the whole operation reveals itself to have been a meter running rather than an asset building.
That's because paid reach is rent. It's useful and often necessary, but it's never yours. The platform owns the audience, sets the price, and changes the rules whenever it suits. And the rent is going up: customer acquisition costs have climbed around 222% over the past five years. Renting the same attention costs more every year, which is a strange thing to call growth.
The alternative isn't to stop buying reach. It's to make every dollar of bought reach leave something behind that you keep. I find it easiest to show as three destinies for the same marketing dollar:
The same marketing dollar, three destinies. Only the third is still working for you in twelve months.
None of this is a new theory, which is what makes the neglect interesting. Email, the original owned channel, still returns about $36 for every dollar spent, a figure that has survived a decade of people declaring email dead. Bain & Company's finding that a five percent improvement in retention lifts profits by somewhere between 25 and 95 percent dates back to research most marketers learned at university and promptly filed away. Repeat customers spend about 67 percent more than first-timers. The numbers sit in plain sight:
Sources: Litmus via HubSpot, 2025 · Bain & Company via DemandSage, 2025 · Envive retention research, 2026
My favourite of all these numbers is the quietest one: a first-time buyer has roughly a 27 percent chance of ever coming back. After a second purchase, the odds of a third jump to about half. After a third, past 60 percent. Each rung of that ladder is cheaper to climb than the one before, because the acquisition cost was paid at the bottom. Which is why most companies end up earning around 65 percent of revenue from existing customers, whatever their dashboards celebrate.
And yet roughly 44 percent of businesses don't measure retention at all. Think about that for a second. Nearly half of companies are running a compounding machine with the gauge unplugged, while watching the traffic needle like hawks.
When I look at a growth budget, I'm really asking one question of every line: does this build an asset, or does it pay rent? Four assets come up again and again, and they're worth naming properly.
Email lists, customer accounts, a community, even a well-run SMS list. Reach you control, with no auction and no algorithm between you and the people who chose to hear from you. The $36-per-dollar economics flow directly from that absence of a middleman. The practical discipline is simple and widely ignored: every campaign, whatever its goal, should also grow the list. A promotion that brings five thousand visitors and captures none of them was a fireworks display.
Retention is the least glamorous word in marketing and the most powerful lever in the spreadsheet. The work is unfashionable: onboarding that actually onboards, service that answers, a reason to return before a competitor supplies one. The finance team usually understands this before the marketing team does, incidentally, because they can see that the second sale carries no acquisition cost. If you track one new number after reading this, make it your repeat purchase rate.
Branded demand is the strangest asset of the four because it's invisible right up until you look for it. People who search for you by name arrive cheaper, convert better, and cannot be outbid, since no competitor can buy being you. It compounds twice over now: brand is also what AI search engines cite and recommend, a shift I wrote about at length in The Future of Search. Every piece of genuinely useful work you publish feeds it.
A guide that ranks, a landing page that's been tested into shape, a checkout that doesn't leak. These behave like capital, not campaigns: built once, productive every day after, and they appreciate with maintenance. The accounting treatment is the giveaway. If something keeps producing value after the invoice is paid, it deserves to be planned, funded and maintained like the asset it is, rather than expensed and forgotten.
You don't need a new dashboard for this, just different questions of the one you have. Is branded search rising? Is the share of revenue from owned channels and returning customers growing quarter on quarter? Do you know your repeat rate, and is it moving the right way? Is each customer cohort paying back its acquisition cost faster than the last? Is content you published months ago still producing leads without new spend? And do referrals arrive without being asked for?
If most of those are flat while sessions climb, what you have is a traffic business wearing a growth costume. The good news is that the costume comes off easily. Pick one asset from the four above, give it a quarter of honest attention, and watch what happens to the numbers nobody was reporting.
This piece sits alongside the advisory I offer charities and not-for-profits, pro bono. If any of it lands close to a decision you are facing, here is where it connects.
Fundraising & supporter growthWhere to invest to grow donations, supporters and repeat giving. Marketing & AI search advisoryStaying found as discovery shifts from search engines to AI answers. The Future of SearchWhy brand demand now compounds inside AI answers, not just on Google.If you're not sure how much of your budget is rent and how much is building something, that's usually a one-conversation diagnosis. I offer this counsel pro bono to charities and not-for-profits, where stretched budgets make compounding matter most. Bring your numbers and I'll bring the questions.