Field Notes

The Growth Systems Blog

Long-form essays on building growth systems that scale without the founder. Real cases. Real numbers. No fluff.

Pillar2026-05-19· 11 min read

The 7x rule: why retention beats acquisition for ecom and SaaS

Acquiring a new customer costs roughly 7 times more than selling to one you already have. Most founders know the number. Almost none act on it. Five retention foundations from a real +€850K case.

2026-05-19· 9 min read

How to switch your ad platforms from optimizing on signups to activation events

Most founders set their ad pixel to optimize on form submits or signups. The platform happily delivers more form submits. Most of them never activate. Step-by-step to switch Meta, Google, LinkedIn to optimize on what actually predicts retention.

2026-05-19· 9 min read

The retention dashboard founders should check weekly (5 metrics in, 5 metrics out)

Founders check ad spend daily, signups weekly, retention quarterly. The order is exactly wrong. The 5 retention metrics that should be on your weekly dashboard, and the 5 vanity metrics that shouldn't.

2026-05-19· 8 min read

Quarterly reactivation campaign template (the 3-email sequence that recovers 10-20%)

Once a quarter, the right reactivation campaign recovers 10-20% of dormant customers. Same template, same timing, same compounding. The 3-email sequence + timing window + when to skip discount.

2026-05-19· 9 min read

Offer-market diagnostic: when to fix the offer vs the funnel (5 questions)

Funnel audit clean. Ad spend healthy. Tracking accurate. Activation reasonable. Growth still doesn't move. At that point you're not fixing the funnel anymore — you're renovating the offer. The 5 questions to know which it is.

Pillar2026-05-19· 12 min read

Why marketing stops scaling at €30K MRR (and what to do about it)

Most founders hit a ceiling around €30K MRR. The marketing that got them there stops working. Five foundations that decide whether you break through or burn out.

2026-05-19· 9 min read

The 1-page marketing SOP template for founder-led teams (cadence + owner + deliverable)

Founders hire marketing managers and watch them drown. The miss isn't talent — it's the system the new hire walks into. The 1-page SOP template that turns chaos into delegation.

2026-05-19· 9 min read

Landing page conversion benchmarks 2026 (by traffic source, destination, industry)

Most founders don't know what 'good' looks like for their LP conversion rate. They feel okay or not okay and move on. Honest benchmarks by cold paid vs warm vs organic, by destination type, by industry. With the diagnostic to read your number.

2026-05-19· 10 min read

GA4 events spec template for B2B SaaS founders (the one-page doc that survives audit)

Most GA4 implementations are silently broken six months in. Events that don't fire. Parameters missing. Channel attribution drifting. The one-page spec doc that prevents this, plus the audit walkthrough.

2026-05-19· 9 min read

Customer interview pipeline for founders: the 5-call template that sharpens positioning

Most founders skip customer interviews because they 'know their customer'. The five-call template that produces positioning sharper than any agency workshop, including the 7 questions every interview answers.

Pillar2026-05-19· 13 min read

Why boutique beats agency for founders €30K-€500K MRR (real economics)

An agency at €30K MRR is the wrong shape for most founders. So is a freelancer. So is an in-house hire. The fourth option — boutique senior partnership — is built for this stage. The TCO math and the structural reasons why.

2026-05-19· 9 min read

B2B SaaS retention benchmarks 2026 (by stage, cohort, and segment)

Most founders compare their retention to nothing. Without benchmarks, the number is meaningless. Honest cohort benchmarks for B2B SaaS, ecom, and subscription businesses in 2026.

Pillar2026-05-19· 11 min read

Ads aren't your problem (your funnel is): a 5-step diagnostic for founders

Most founders blame the ad creative when paid results stall. Usually it's the funnel that's leaking in step three or four. A 5-step diagnostic to find where the money is actually disappearing.

2026-05-19· 8 min read

Ad-to-LP alignment audit: the 3-point check that recovers 30-60% conversion

Three weeks ago, an ad-LP alignment audit took a founder from 0.8% to 2.4% conversion in 14 days. Same ads, same audience, same budget. The 3-point check (headline, proof, CTA) most founders skip.

2026-05-19· 10 min read

How to define your activation event in 7 days (SaaS, ecom, service business)

Most founders track signups and call it activation. Activation is the moment a user gets value once — the single best predictor of retention. The 7-day process to define yours and start optimizing the right thing.

2026-05-19· 11 min read

The 4-flow email engine every founder needs (welcome, abandon, post-purchase, win-back)

Most founders treat email as a newsletter. The actual lever is four automated lifecycle flows — welcome, abandon, post-purchase, win-back. Tactical setup for each, with timing and content.