One randomized trial, eight weekly reads, two verdicts.
A finished controlled experiment makes a single point more persuasively than any claim we could make about ourselves. Category and figures are altered to protect the client; the design, the discipline, and the direction of every result are exactly as run.
How the trial ran.
From the full book to the trial pool
Counts approximate · widths not to scale
The setup
A DTC apparel brand was scaling acquisition hard. Nearly four in five of its customers had bought exactly once. Dashboards looked healthy. Contribution was flat. Their reporting answered 'how many did we acquire?' but never 'were they worth acquiring?'
Score, then select
We scored roughly 120,000 customers by 12-month forward value, after product costs and expected returns. The top decile of one-time buyers justified real investment before any email was sent; the model separated them from the majority who would not repay a dollar of spend.
The experiment
An eight-week randomized controlled trial on the selected pool, three arms: a control, a modest targeted offer, and the same email with no offer. Read dates and stopping rules were registered before launch, and every read carried a 95% confidence interval.
The verdicts
The targeted offer built measurable forward value and rolled out inside the client's existing Klaviyo account with zero new build. The no-offer email was statistically zero for eight straight weeks and was retired.
Two emails. One built value. One only looked like it did.
Same customers, same window, same dashboard. On engagement they were hard to tell apart. Forward CLV told them apart in every single read.
The reminder without an offer
12-month forward value built per targeted customer
95% CI spans zero · all eight weekly reads
On the engagement dashboard it looked healthy: opens, clicks, and a conversion rate within a point of the offer arm. Forward CLV read it as noise in every single week. Our recommendation was to stop sending it and reclaim the budget.
The targeted offer
12-month forward value built per targeted customer
95% CI +$1.30 to +$9.10
A modest offer, sent only to the one-time buyers the model selected. Its interval pulled clear of zero and stayed clear through the final read.
We’re deliberately careful here: this is one brand’s result. We report it as a range, not a guarantee, and half of what it proved is that we will tell you to stop doing something. The only way to know what it means for you is to run the same measurement on your customers. It starts with the Diagnostic, which scores every customer by 12-month forward value, the way this trial’s customers were scored.
Read further
Score your own customers the way the trial did.
The Diagnostic is free. It scores every customer in your store by Forward CLV over one read-only Shopify connection, and shows where your value concentrates and where it leaks.
Read-only access · No deck required · You keep the analysis either way