⚡ How I Use the Diderot Effect to Increase Email Revenue
Most brands chase the first sale. Smart brands orchestrate what comes next.
⚡ "Every purchase creates a chain reaction of desires. Your job isn't just to trigger the first sale—it's to orchestrate the cascade that follows. Back your winners with relentless follow-up." —Luis Lozano, Copybeast
From just east of Mackenzie Creek Park — hey, it’s Luis.
Quick Pickleball note: we hit San Diego’s Premier Tennis and Pickleball Center this weekend — home to a recent USA Pickleball tournament. Turns out our local courts run hotter than the tournament venue. Sometimes the best competition is right in your backyard.
Same is true in email. The biggest revenue opportunity isn’t some untested new channel. It’s the list you already have.
Denis Diderot bought a robe and went broke.
In the 18th century, the French philosopher received a beautiful scarlet robe as a gift. It was elegant. It was expensive. And the moment he put it on, everything else in his home suddenly looked shabby by comparison.
So he replaced his desk. Then his chair. Then his rug. One purchase cascaded into dozens — each one justified by the last.
James Clear wrote about this in Atomic Habits and named it the Diderot Effect: the tendency for one acquisition to trigger a chain reaction of new desires.
For e-commerce email marketers, this is one of the most important psychological principles you’ll ever deploy.
Here’s why it matters for your revenue.
When a customer makes their first purchase, they’re not done — they’re primed. RJMetrics research shows you have a 30-to-90-day window after that first transaction where a second purchase is most likely. The new customer’s guard is down. Your brand is fresh in their mind. The Diderot Effect is already working on them subconsciously.
Your job is to orchestrate what comes next.
Most brands celebrate the first sale and then go quiet. The brands that compound revenue treat the first sale as the opening move — and immediately deploy a wave strategy to ride the momentum.
Watch how Alex Mill does it.
Alex Mill ran a three-wave sequence around their Spring Collection — and the moves are worth studying closely.
Wave 0 — The Tease: Spring Collection Lands Tomorrow - And it’s all about the details
Before the collection even dropped, Alex Mill sent a teaser. No product. No link to buy. Just anticipation. This is desire being channeled before there’s anything to sell — and it means the launch email lands in an inbox that’s already warm.
Wave 1 — The Launch (January 29): SPRING COLLECTION IS HERE 🌷 - and it’s all in the details
That first email channels desire that already exists. Your customers are already thinking about spring. They’re already browsing. Your email just directs that energy toward your product — and it absolutely should convert. Write it to sell.
Wave 2 — The Follow-up (February 16): You’ll love these spring favorites - Hi! It’s Bridget from the merch team at Alex Mill.
Notice what changed. The first email was the brand speaking. The second email is a person speaking — Bridget, from the merch team. That shift from corporate to personal is deliberate. It maintains warmth without feeling like another blast.
Three emails. A tease, a launch, a follow-up. A complete wave.
📁 Paid subscribers: all three Alex Mill emails — the tease, the launch, and the Bridget follow-up — are waiting for you below. Add them to your swipe file.
The Row runs the same play, faster.
Where Alex Mill spaces their waves over 18 days, The Row runs a tighter sequence — three emails in 10 days (Subject line + Preview):
February 4: Introducing The Spring Collection 2025 - Shop the Spring Collection
February 11: Spring Silhouettes - Shop signature silhouettes of the season
February 14: Spring 2025 Handbags - Discover handbags from the Spring Collection
Broad to specific. Desire to decision. Each email narrows the funnel.
Both strategies work because they maintain momentum inside that crucial 30-to-90-day window. The difference is tempo. Alex Mill lets desire breathe. The Row concentrates the follow-up. Neither is wrong — the right choice depends on your audience’s buying rhythm.
The pattern across brands like Vuori, Patagonia, Timberland, and Jonathan Adler is the same: one launch email, one or two follow-ups, a consistent seasonal identity threading through all of them.
Your three-step battle plan.
1. Launch with a single focused wave.
Start with a tease 24-to-48 hours before your collection drops. One line, no hard sell — just signal that something is coming. Then launch. Your first email should convert — write it to sell. But your customers are at different stages of readiness. Some will buy immediately. Most won't — yet. The follow-up exists to capture everyone else without starting over from scratch. For brands under $3M, the answer is almost always simpler than you think: you don't need a better campaign. You need more follow-up on the one you already have.
2. Deploy your follow-up in the 2-to-3 week window.
Make it personal. Use a real name if you can. Narrow from collection to category. The reader who didn’t buy on wave one is still warm — they just need a different angle.
3. Match your tempo to your audience.
If your buyers are deliberate, give them space like Alex Mill. If they move fast, tighten the follow-up like The Row. Look at your open and click data after wave one — it will tell you who’s still in the game.
The Diderot Effect is already working on your customers whether you use it or not. The scarlet robe has been purchased. The question is whether you’re the brand that helps them complete the collection — or the one they forgot about while someone else did.
Follow a premium brand with emails worth studying? Drop it in the comments. If I feature it in a future issue, I’ll give you the credit.
Talk soon,
Luis Lozano
Founder & Editor, ⚡️Copybeast
P.S. — The three Alex Mill wave emails are in your swipe file below. Download them and add them to your collection.
