Substack Writers at Work with Sarah Fay

Substack Writers at Work with Sarah Fay

The 8 Reasons People Pay for Substack Subscriptions and the Neuroscience Behind It

+ WEEKLY THREAD! Newbies, introduce yourselves. Veterans, say hello.

Sarah Fay, PhD's avatar
Sarah Fay, PhD
Nov 12, 2025
∙ Paid
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Come on a waljogrun (walk-jog-run) with me to hear me read and riff on the post, plus bonus material here. ↑


I want you to have lots of paid subscribers—if that’s what you want. I’ve said many times that everyone deserves to be paid for their work, from McDonald’s to Substack.

Those in the Substack Advice Industrial Complex give you the same recycled internet advice: run sales, create scarcity, FOMO.

But Substack is—and always has been–different. Earning an income on here requires way more than surface-level tactics. It’s deeply rooted in having the right foundation and knowing your Substack DNA.

Below:

  • The 8 reasons people pay for subscriptions

  • The neuroscience behind it, so we can understand our subscribers and meet them where they are, not try to mindgame them

  • What to do differently in light of it


The big 3: oxytocin, endorphins, dopamine

We live by what’s called the motivational triad. Evolutionarily, we’re designed to seek pleasure, avoid pain, and maintain homeostasis. (So if you don’t feel like writing your Substack or posting, you are a completely normal human.)

Yellow and red against grey brain fmri imaging
How dopamine drives brain activity, MIT, 2020

Every subscription decision runs through three neurotransmitters:

  • Oxytocin = Trust, connection, relationship, tribal belonging

  • Endorphins = Relief, pleasure, sense of progress

  • Dopamine = Anticipation, reward prediction, motivation, learning from past experiences


The 8 reasons do (and don’t) people pay for Substack subscriptions

1: Habit loops

The old approach to developing your paid offer was to give people as much and as much variety as possible. Not anymore. People are busy. Their inboxes are full.

The neuroscience: We want our posts to be a habit loop for our subscribers that triggers dopamine (anticipation) + oxytocin (familiarity).

  • A consistent post structure, e.g., the same opening, a recognizable format, a familiar voice = oxytocin bond

  • Unpredictable topics = sustained interest without habituation

(In December, Premier Members will be creating a personalized structure for your posts.)


2: Specific calls to action (CTAs)

I want you to think about  anticipated rewards based on past experiences in terms of your calls to action (CTAs). Your CTA is the phrasing you have around your subscribe button. Write your own compelling, original CTA. No defaults. No ChatGPT. Yours.

The neuroscience: (learned reward patterns) Your brain’s dopamine system learns from past subscriptions. If readers paid for newsletters before and got burned, the caudate nucleus stores: “Paid subscriptions = disappointment.”

When they see This is a reader-supported publication. Consider becoming a free or paid subscriber (Substack’s default), their brain connects it to every other disappointing subscription with that exact CTA.


3: Identity alignment

People don’t just buy subscriptions. They invest in them.

The neuroscience: Those subscriptions can function like an identity and sense of tribal belonging, triggering a healthy dose of oxytocin.

Substack’s new (kind of creepy) paid-subscriber flower badges reinforce this. You receive a badge for each of the Substacks you pay to subscribe to. Comps and gift subscriptions don’t count.

*You can hide your badge and the Substacks you subscribe to. (Profile → Edit → Subscriptions, or by tapping your own badge → “...” → Edit subscription visibility)

Note: Dan Stone has his creepy flower badge visible and Amber Tamblyn does not. And, yes, Dolly Parton is on Substack!

4: Parasocial relationships

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