The #1 Newsletter for E-Commerce Operators

HARD MARGINS

We are E-Commerce brand builders sharing our best practices, industry benchmarks, marketing strategies and data insights in a weekly newsletter.

By Alex Jost · Founder, RetentionX

Join over 45k+ readers, with articles published 1x a week.

Featured

Jan 14, 2025

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9 min read

Scaling to $100M+ on Shopify

The recipe for scaling a brand to $100M+ on Shopify and the essential role of retaining customers.

Alexander Jost

Jan 21, 2025

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20 min read

The LTV Playbook

Inside the top 1% of eCommerce: How leading CEOs use LTV to drive strategic growth

Alexander Jost

May 13, 2025

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9 min read

Strategic Merchandising

Discover how strategic merchandising can transform your e-commerce performance, boosting revenue by 60% without increasing traffic or acquisition costs.

Alexander Jost

Weekly Strategy

Your Ad Platforms Aren't Broken. They're Learning From The Wrong Signals.

Apr 30, 2026

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12 min read

Your Ad Platforms Aren't Broken. They're Learning From The Wrong Signals.

Plus: Introducing Hard Margins. Same newsletter. New name. And we just launched a podcast.

Alexander Jost

Apr 23, 2026

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3 min read

The SKU Graduation Board

Most brands promote everything too early. This team built a system to stop that.

Alexander Jost

Apr 16, 2026

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2 min read

One customer. Five identities.

You can't make good decisions about customers you can't identify.

Alexander Jost

Apr 9, 2026

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4 min read

ROAS Went Up. Payback Got Worse.

That’s not performance. That’s debt with good branding.

Alexander Jost

You're Not Managing Returns. You're Managing an Average.

Apr 2, 2026

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4 min read

You're Not Managing Returns. You're Managing an Average.

The customers destroying your contribution margin aren't hard to find. You're probably emailing them a promo right now.

Alexander Jost

Mar 26, 2026

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5 min read

Drops are cadence engineering

Limited drops are one of the best ways to break customers out of their usual buying cycles and pull orders forward, if you do it right.

Alexander Jost

Deep Dives

Feb 26, 2026

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8 min read

Your Catalog Is Your Retention Strategy

Most brands treat their product portfolio like an inventory list. The best ones treat it like a growth system.

Alexander Jost

Feb 13, 2026

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8 min read

Your Subscription is Too Fast

If your data says the median replenish time is 60 days, why are you forcing 30-day subscriptions?

Alexander Jost

The New Marketing OS: A Strategic Framework For Growth

Jan 29, 2026

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16 min read

The New Marketing OS: A Strategic Framework For Growth

The Operating System Behind Profitable Growth

Alexander Jost

Portfolio Strategy: Protect Icons, Refine Entry & Elevate Top End

Jan 25, 2026

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6 min read

Portfolio Strategy: Protect Icons, Refine Entry & Elevate Top End

Icons protect brand meaning, entry points feed acquisition, and hyper-luxury maintains the ceiling of desirability.

Alexander Jost

Jul 15, 2025

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7 min read

BFCM Strategy

Discover how smart DTC brands can turn Black Friday from a short-term sales rush into a strategic opportunity for building long-term customer loyalty and profitability.

Alexander Jost

Jul 15, 2025

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6 min read

Black Friday Preparations

Unlock Black Friday success with Nordstrom's proven $100M strategy: Smart customer segmentation, strategic sale invitations, and boosting full-price sales through exclusive event access.

Alexander Jost

Jul 8, 2025

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6 min read

Free Shipping Threshold

How to find the sweet spot where customers are motivated to spend a bit more to qualify for free shipping without making it so high that they abandon the purchase completely.

Alexander Jost

Jul 1, 2025

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5 min read

Welcome Discounts

Uncover the hidden costs of welcome discounts and why a 10% coupon might be hurting your DTC brand's profitability more than helping it.

Alexander Jost

Jun 24, 2025

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6 min read

Product Cannibalization

Discover how strategic product cannibalization can be a game-changing growth tactic for brands, turning potential sales loss into a powerful competitive advantage in eCommerce.

Alexander Jost

Jun 17, 2025

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7 min read

Cross-Selling & Upselling

The higher the AOV, the more orders will follow. It's that simple. Increasing AOV is therefore an incremental growth driver.

Alexander Jost

Jun 10, 2025

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6 min read

Product Affinity

Discover how product affinity data reveals consumer shopping behaviors and strategies to turn first-time buyers into loyal, repeat customers across different brands.

Alexander Jost

Jun 3, 2025

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5 min read

Sales Velocity

Unlock the power of sales velocity: Learn how real-time insights into product performance can drive growth and optimize your retail strategy.

Alexander Jost

May 20, 2025

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6 min read

The Bestseller

Uncover the secrets behind creating bestselling products and breaking the self-fulfilling prophecy that keeps your brand stuck with limited top performers.

Alexander Jost

May 13, 2025

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9 min read

Strategic Merchandising

Discover how strategic merchandising can transform your e-commerce performance, boosting revenue by 60% without increasing traffic or acquisition costs.

Alexander Jost

May 6, 2025

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4 min read

The Milk Problem

Discover how strategic product placement and the "milk problem" can boost DTC eCommerce profits by 25% through smart merchandising and customer psychology.

Alexander Jost

Apr 29, 2025

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6 min read

Replenishment Time

Truly understand when your customers run out of what they love, and step in at exactly the right time— dramatically boost loyalty and repeat purchases.

Alexander Jost

Apr 22, 2025

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11 min read

Product & Brand Stickiness

Discover how product stickiness drives customer retention, revealing which products keep buyers coming back and help build lasting brand loyalty.

Alexander Jost

Apr 15, 2025

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6 min read

Repeat Purchase Rate

Uncover 5 powerful strategies to accelerate your ecommerce profits through repeat purchase rates, shorter order intervals, and strategic limited drops.

Alexander Jost

Apr 1, 2025

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8 min read

Target Audiences for the Holiday Season

5 customer segments for the holiday season to maximize sales and create targeted marketing campaigns.

Alexander Jost

Mar 25, 2025

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6 min read

Buying Power Index

Unlock the power of the Buying Power Index (BPI) to forecast retail demand, assess market potential, and strategically grow your ecommerce business with data-driven insights.

Alexander Jost

Mar 18, 2025

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4 min read

The Low CPM Myth

Uncover the hidden truth behind low CPMs and how chasing cheap impressions can sabotage your ecommerce brand's profitability and customer lifetime value.

Alexander Jost

Mar 11, 2025

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7 min read

Broad Targeting

Expose the truth behind broad audience targeting and how it's costing advertisers millions by inflating CPMs and reducing customer quality across digital marketing platforms.

Alexander Jost

Mar 4, 2025

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6 min read

Reducing Returns

Uncover how strategic customer segmentation can dramatically reduce return rates and boost e-commerce profitability by identifying and targeting the right buyers.

Alexander Jost

Feb 25, 2025

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6 min read

Customer Concentration

Unlock the power of customer concentration: Learn how a small share of customers can drive massive effects and transform your business's growth and revenue strategy.

Alexander Jost

Feb 18, 2025

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4 min read

The Forgotten Longtail

Uncover the hidden impact of the 'long tail' effect on ecommerce marketing ROI and learn how overlooking subtle customer behaviors can cost brands millions in potential revenue.

Alexander Jost

Feb 11, 2025

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4 min read

The Simpson Paradox

Uncover how Simpson's Paradox can mislead ecommerce executives, causing critical strategic mistakes in data interpretation and business decision-making.

Alexander Jost

Feb 4, 2025

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9 min read

RFM Analysis & Customer Segmentation

Unlock customer insights with RFM analysis: segment customers by recency, frequency, and monetary value to boost loyalty, retention, and targeted marketing strategies.

Alexander Jost

Jan 28, 2025

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14 min read

Customer Cohorts

Master customer retention with cohort analysis: Track behavior, reduce acquisition costs, and boost sales by understanding your most valuable Shopify customer groups.

Alexander Jost

Jan 21, 2025

•

20 min read

The LTV Playbook

Inside the top 1% of eCommerce: How leading CEOs use LTV to drive strategic growth

Alexander Jost

Jan 14, 2025

•

9 min read

Scaling to $100M+ on Shopify

The recipe for scaling a brand to $100M+ on Shopify and the essential role of retaining customers.

Alexander Jost