🔥 Growth Test for Serious Substack Writers (Beta Open)

Double your growth using Notes you’ve already written — no extra content required (10 beta spots • Serious creators only)

If you’ve been posting Notes for months and still aren’t seeing traction, I’ve been there. That’s exactly why I built this system.

I used to think I needed to publish more to grow.

Then I ran an experiment starting June 24th, and something unexpected happened.

• 🧠 I analyzed my top-performing Notes

• ♻️ Reused and lightly edited them

• 📅 Scheduled simple 7-day sequences using a new tool I built

No viral Posts. No viral Notes. No ads.

The outcome? +24% free subscriber growth in 30 days - not from virality or luck, but from consistent, strategic re-sharing of proven Notes.

This system works because it builds on what’s already connecting with your audience.

I’m not promising guaranteed growth, but if you’ve got a strong backlog and are willing to test a smarter reuse strategy, the gains can be real.

The same 4 hours per week writing - just a smarter reuse of what already worked.

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Savvy creators will immediately ask:

• “How big was your list to begin with?”

• “Is 24% statistically meaningful or within noise?”

• “Was this a one-off success or repeatable?”

Check my Notes archive [link] and compare the subscriber count from June 24 to July 24 from the Substack charts below.

I started with 706 free subs and ended the month at 876 - this is a +24% increase tracked via Substack analytics.

This wasn’t a fluke - I repeated it from July 24, and I’m seeing similar gains - I am at 937 now. This is during the summer season when many other creators are complaining about slow growth or loss of subscribers.

The majority, 73.4% of this growth, came from the Substack App surface, as shown in the graph below.

Since I am not a bestseller and not very active on Chat, this growth was primarily due to the 117 Notes I posted between June 24 and July 24.

The growth may sound good, but skeptics will wonder:

• “How does this compare to my regular growth?”

• “What if I’m already growing at 10–20% per month?”

From Dec 24 to June 24, I grew from 325 to 706 subscribers — an average growth rate of 13.6% per month.

Then, without spending time writing new content— just reusing my old best-performing Notes — I nearly doubled that pace, hitting +24% growth in a single month.

How was this even possible?

The method I’ve used to select “best-performing” Notes is explained in detail here:

How Treating Notes Like a Portfolio Unlocked 22% Subscriber Growth in 27 Days

You may ask, how can anybody write 30 Notes per week, spending just 4 hours?

I get it - “30 Notes per week in 4 hours” sounds like one of those too-good-to-be-true claims.

But here’s what actually made it work: I wasn’t writing from scratch.

I used a simple, repeatable method to surface my best-performing Notes, lightly revise them, and re-share them with new context or timing.

I recorded a walkthrough showing how I do this in about 60 seconds per Note — not because I’m cutting corners, but because I’ve systematized the hard thinking upfront.

It’s not magic. It’s a structured reuse of what already resonates.

How To Write Notes That Convert - In One Minute (or Less)

🧪 Want to do this experiment for yourself?

This is what one of the early beta testers said:

I’m opening 10 free beta spots for creators who want to replicate this exact system over the next 30 days.

This is not a sales pitch or course.

It’s a structured experiment designed to help you grow using what you’ve already created with less effort.

You’ll get free access to:

✅ Substack Pro Studio tool (analytics, AI assistant, and scheduling)
✅ Substack Pro Studio User Guide
✅ My personal AI prompts for analyzing and reusing Notes
✅ An optional one-hour onboarding call to discuss your specific case
✅ An optional shout-out or case study if you hit milestones

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🔥 Who is this for?

This works best if you:

• Post Notes regularly, but feel like your best ones are buried

• Want to grow faster without creating a lot more work

• Have a back catalog of 200+ Notes ready to tap into

• Have at least one clear offer or product for your audience

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🧪 Experiment Rules

This is a real test, so you’ll need to commit to a few things:

📌 Minimum 200 published Notes
📌 You have at least 100 free subscribers and one clear offer or product
📌 Post your subscriber count publicly before & after
📌 Publish at least 100 Notes in 30 days using the system

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🧠 Common Questions

What if I already grow 10–15% per month?
Great — this can compound your growth additional 10% without extra work.

Is 24% growth repeatable?
From July 24th I’m seeing similar gains. I’m looking to validate this method across different creators and niches.

Will this cost money later?
The beta is 100% free. If the product becomes a paid tool later, beta testers will keep free access and upgrades for life of the tool.

Why 200 Notes?
This system works best when there’s a deep backlog - it’s designed to help you surface and re-use your hidden gems. If you haven’t posted 200 Notes yet, that just means your catalog isn’t quite ready for this phase.

That said, I totally understand how frustrating it can be to hear “you’re not ready” when you’re trying hard to grow. If you’re committed and getting close (say, 100+ Notes), I’m considering a lighter version of the system built for smaller catalogs.

If that sounds like you, just check the box in the sign-up form - I’ll keep you posted on the next round and send a guide to help you build up your backlog faster and more strategically.

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📬 How to join

If you’re in, do the following:

Fill out this short sign-up form - it takes less than 89 seconds

I’ll personally onboard each of the 10 beta participants, and spots are first come, first served.

Let’s test this together and turn it into a repeatable growth system that you and other Substack creators can benefit from.

— Finn