I Read 127 Posts About Substack Growth So You Don't Have To (Here's What Actually Works)

Most Substack newsletters don't fail because of a bad idea.They're just making a handful of mistakes that are nearly invisible from the inside.

Most Substack newsletters don’t fail because of a bad idea.

They fail quietly. The writer shows up, publishes consistently, does everything they’ve been told to do and still watches their subscriber count barely move.

They’re not lazy. They’re not untalented. They’re just making a handful of mistakes that are nearly invisible from the inside.

I’ve spent weeks reading everything written about Substack growth, possibly hundreds of posts, coaches, data studies, and writer case studies. And these same seven mistakes keep appearing, regardless of the niche, the writing quality, or how long someone has been on the platform.

Here they are and more importantly, here’s what to do instead.

Mistake #1: Treating Substack like a blogging platform

This is the most common and most damaging mistake of all.

Writers publish a post, hit send, and wait. No Notes. No engagement. No recommendations. Just content into the void (and the assumption that good writing alone will bring people in).

The problem is that Substack is not WordPress. It is not Medium.

When you have 2, 5, or even 50 subscribers, the algorithm does not show your posts or Notes in the general feed, regardless of how much you publish.

What the algorithm actually responds to is how much you interact with other people on the platform, which includes comments, likes, and conversations.

Writing is only part of the equation. Showing up in the ecosystem is the other part, and most writers skip it entirely.

Alesia Zakharova talks about it in her substack “Grow Smarter With AI”→ I Used Claude To Analyze 100 Substack Newsletters That Couldn’t Break 100 Subscribers

She used AI to analyze 100 Substack newsletters with fewer than 100 subscribers and found that this was the single most consistent reason they never grew.

What to do instead: Think of your long-form newsletter as the foundation. Think of everything else — Notes, comments, recommendations, collaborations as the growth engine. You need both.

Mistake #2: Writing for everyone and reaching no one

Vague publications don’t grow.

“I write about life, creativity, and personal growth” tells a new visitor nothing about why they should subscribe.

The more specific your value proposition, the faster your audience grows. Because specific publications attract specific readers who actually stay.

The most successful Substack publications can describe exactly who they help and what they deliver in one sentence. If you cannot do that yet, your About page is working against you every single day.

If you cannot communicate your publication’s value in one sentence ‘who it helps and what they get’ then you don’t yet have clarity on what your newsletter actually is.

What to do instead: Test yourself. Write down in one sentence exactly who your newsletter is for and what they get from it. If it takes three sentences, keep cutting until it fits in one. Then make sure your profile description, your About page, and your pinned post all say the same thing.

Mistake #3: Paywalling your best content too early

This one is counterintuitive, but the data is clear.

Locking your strongest posts behind a paid tier in your first six months kills your growth.

Your best content is your best advertisement. Every person who reads a genuinely excellent free post and thinks “this is exceptional” becomes a subscriber, a sharer, and eventually a buyer.

Hide that post behind a paywall, and NONE of that happens.

What to do instead: Keep your best two or three posts permanently free. Pin your strongest one to your profile. Let it work as a 24/7 growth engine. The paid tier comes later, once you have an audience that already trusts you.

Mistake #4: Ignoring the recommendations feature

Substack’s recommendations feature is the single most underrated growth tool on the platform. When you recommend another newsletter and they recommend yours, both publications grow.

Lenny Rachitsky of Lenny’s Newsletter publicly shared that 78% of his new subscribers were coming directly from other newsletters recommending his. Chenell from Growth in Reverse talks about it here: The 5 Biggest Takeaways From Lenny's Journey To 1 Million Subscribers. He called it a “game-changing feature” and one of the most impactful growth tools he’d ever seen.

But most new writers either ignore it completely or do it wrong. Like recommending every newsletter that asks, regardless of audience fit, until their recommendations page becomes meaningless noise.

What to do instead: Choose five to seven newsletters whose readers would genuinely benefit from yours. Build a real relationship with those writers first. Engage with their Notes, reply to their posts, then ask for a swap. Quality over quantity, every time.

Mistake #5: Publishing without a consistent schedule

Inconsistency is the silent killer of newsletters.

A reader who subscribed three weeks ago and has received nothing since has already emotionally unsubscribed. They just haven’t clicked the button yet.

Consistency is not about frequency. It’s about reliability. One weekly newsletter, same day, every week, builds more trust than three posts one week and nothing the next.

What to do instead: Choose one day. Protect it. Publish on that day every single week without exception. Pull content from an emergency content bank you’ve built in advance if life gets busy (which it WILL!) Never miss your day.

Mistake #6: Using Notes as a broadcast channel

Writers who post a Note and immediately close the app are missing the entire point of the feature.

Notes is not a megaphone. It’s a conversation.

The writers growing fastest on Substack are spending as much time engaging with other people’s Notes as they are posting their own, including liking, replying, restacking (add your own thoughts too!)

Every thoughtful comment you leave on someone else’s Note is free visibility. Their entire audience sees it. Some of those readers will click your profile. Some will subscribe.

The most practical daily framework for doing this consistently is the 10-5-1 rule, developed by Philip Hofmacher from Write • Build • Scale. It is the most actionable daily engagement habit I’ve come across for new Substack writers. → 3 Lessons I Learned From Publishing Substack Notes for 365 Days Straight

He tells you to follow this daily substack routine:

· like 10 Notes from writers in your niche,

· leave 5 genuinely thoughtful comments on other people’s Notes or posts, and

· send 1 DM to a writer you admire.

What to do instead: For every Note you publish, spend time engaging with at least ten others. This is the 10-5-1 rule in practice.

Each action does a specific job. The likes and comments create algorithmic signals and free visibility, and the DM builds the real relationships that eventually lead to recommendation swaps and collaborations.

Mistake #7: Waiting until everything is perfect before starting

This is the mistake that costs the most time and generates the least return. Writers spend weeks perfecting their About page, their logo, their niche, their posting schedule and publish nothing.

Meanwhile, the writers who started imperfectly three months ago have thirty posts, a growing audience, and a clear sense of what their readers actually want.

Substack is not something you understand before you start. It is something you learn while doing it. Clarity comes from publishing, not from planning.

What to do instead: Start before you’re ready. Your first ten posts exist to teach you what your newsletter actually is. The writers still here in two years are not the ones with the best ideas in month one, they’re the ones who kept going past the point where it felt pointless.

All these mistakes are fixable…

None of these mistakes are fatal. Every single one is fixable, often within a week. The writers who grow on Substack are no more talented than those who don’t. They’ve just stopped making the mistakes that keep most writers invisible.

If Inside the Stack does its job right, you’ll never have to hunt for this kind of insight again. Every week, I read everything being written about Substack growth and send you only what’s worth your time.

I believe good advice should reach every writer, that’s why Inside the Stack will always be free. If anything here helped you, pass it on to a friend who’s figuring Substack out. That’s how this grows. And hey, if you want to say thanks, I’m always up for a coffee. ☕