If your marketing agency is bragging about a 4x or 5x ROAS while your net profit
By Jasonlandro · June 14, 2026 · Curated by George's Blog
If your marketing agency is bragging about a 4x or 5x ROAS while your net profitability is shrinking, you are paying them to cannibalize your organic revenue
It is a basic mathematical reality: if an ad campaign is heavily weighted toward your own branded search terms, your ROAS will look exceptional
But from a macro-level view, you aren’t acquiring new customers
You’re simply paying Amazon a tax on sales you would have captured anyway
If you want to transition from inflated vanity metrics to true scaling, you need a surgical approach to your unit economics
We look at ad efficiency through a three-step framework:
1. Isolate Branded Spend:
Track your non-branded vs. branded ad distribution. If the majority of your budget feeds high-intent branded keywords, you are hiding inefficient top-of-funnel performance.
2. Use Search Query Performance Data in Brand Analytics to Measure Purchase Share
Amazon gives you your purchase share for individual search terms for all your ASINs
You literally have the data at your finger tips to measure purchase share for branded (and non-branded terms) at the ASIN level
You can then correlate it with ad spend to determine whether the spend is driving incremental sales
We do this automatically with our iDerive analytics platform
3. Prioritize NTB Customers and Customer Lifetime Value over ROAS
If you’re driving more new-to-brand customers, odds are is that you’ll have a lower ROAS but the sales will be incremental
You can compound that growth by focusing on increasing customer lifetime value, especially if you sell subscription/consumable products
AMC gives you the data to measure new to brand versus returning customers and customer lifetime value by ASIN
We surface this data automatically in our iDerive platform
At Nectar, we treat our clients’ brands like our own
That means we don't celebrate a high ROAS if it means bleeding your bottom-line margin
Are you auditing your ad spend for organic cannibalization?
Or are you still trusting the default agency dashboard?