Watch the leading indicators, not revenue. Cost of customer acquisition drifting up while sales look flat, the same three initiatives in the plan for three months running, nobody ever recommending you kill anything, and a new account manager every quarter. Revenue moves last, and by then you have lost a quarter.
The short version
- Rising cost of customer acquisition at flat sales means you are buying the same revenue for more.
- Rising share of revenue from paid means they are renting you sales, not building an asset.
- The same initiatives every month means nothing is shipping.
- No kill recommendations, ever means the retainer is funding optimism.
- Account manager churn means your brand context is rebuilt from scratch each time.
The leading indicators
I run Flapen with 50 operators managing about 70 brands, and the majority are profitable within their first year. When an account is going wrong, these show up months before the revenue line does.
| Indicator | What you see | What it means |
|---|---|---|
| Cost of customer acquisition | Drifting up, sales flat | Same revenue, more money |
| Share of revenue from paid | Rising every month | Organic is not being built |
| Plan contents | Same three items monthly | Nothing shipping |
| Kill recommendations | None, ever | Structural incentive winning |
| Reporting | Longer, fewer numbers | Activity replacing outcomes |
| Named contact | Changes each quarter | Context lost repeatedly |
| ACoS target | Unchanged for a year | No adjustment by product stage |
Share of revenue from paid
The most useful single number and the one least likely to appear in your report.
An account can look healthy on ACoS while paid quietly becomes the only thing holding revenue up. Every individual month looks fine. Over a year, you have a business that collapses the moment you pause advertising, because nothing was built underneath.
Track it yourself if the report omits it. Rising for three consecutive quarters is a serious problem regardless of what every other metric says.
The unchanged ACoS target
A new product needs aggressive ACoS to build velocity and ranking. A mature product needs efficient ACoS to protect margin. If your target has not moved in a year while your products have matured, nobody is managing to product stage.
Ask what your target is and why it is that number today. If the answer is the same as it was at launch, that is not a strategy, it is a setting.
No kill recommendations
Any agency on a recurring fee has a structural incentive to keep every product alive. That is not dishonesty, it is arithmetic.
I kept pouring money into a failing product for three months hoping the ads would turn around. They did not. That is where our kill criteria came from: rating trend, return rate, conversion rate, and cost of customer acquisition trajectory, measured over a defined window.
Ask what they have recommended killing in the last two quarters. Nothing, across a catalog of any size, is the answer.
How to check without waiting for the report
Five things you can look at yourself this week:
- Business Reports in Seller Central. Sessions, unit session percentage, and units ordered by product over 90 days.
- Ad spend against total revenue. Compute the paid share yourself, monthly, for a year.
- Return rate by product, trended. Rising return rate is a sourcing problem nobody is naming.
- Your last three plans. Put them side by side and count repeated items.
- Buy Box percentage. Slipping quietly is common and rarely reported.
None of that requires the agency's cooperation, which is the point.
When is it underperformance and when is it the market
Fair question, and worth separating before you act.
Some things are outside an agency's control: a category-wide demand decline, a new dominant competitor, or a supply problem that puts you out of stock. What is inside their control is whether they told you, when, and what they proposed.
The test is not whether the numbers went down. It is whether the diagnosis was timely and specific. An agency that identified a demand decline in month two and proposed a response is doing its job even if revenue falls. An agency that explained the decline in month seven, after you asked, is not.
What most agencies will not tell you
Reporting is designed to be reassuring. Spend and sales both rising looks like success and can coexist with a business getting steadily worse, because both numbers respond to budget.
The metrics that would reveal the problem, cost of customer acquisition by channel and organic share of revenue, are the two most commonly absent from agency reports. They are not hard to calculate. They are absent because they are the ones that can look bad while everything else looks good.
Ask for both, in writing, every week. How that request lands tells you more than the numbers will.
Related answers
- Signs your Amazon partner is underperforming
- How to audit current Amazon agency performance
- When to switch Amazon agency
- KPIs an Amazon agency should report weekly
- Hiring an Amazon agency: the complete guide
If you want a second read on your current account, the audit is free at Flapen.
