Substack readers, your customer list: moving them across with CSV

You have been publishing every other Sunday for two years. The subscriber number has climbed to something you are quietly pleased with. Readers reply, sometimes at length, and a few of them have asked whether you sell anything — a workshop, the templates you mentioned in March, an hour of your time. You have said "not yet" more than once, because setting up somewhere to sell felt like a project and the newsletter was already the work.

The gap between a readership and a business

A newsletter platform is very good at exactly one relationship: writer to reader, in an inbox, on a schedule. That is not a small thing and it is why so many people stay. The trouble starts when the reader wants something that is not an essay — a paid course, a booked call, a file, a membership with a real feed rather than an archive.

The honest difficulty is that most attempts to solve this add friction to the thing that was working. You bolt on a second platform, readers get sent somewhere unfamiliar, and the whole apparatus starts to feel like a funnel rather than a correspondence. People can tell, and they read less. The version that survives is one page they can recognise — store.fan/you, holding everything, mentioned in a footer rather than a hard sell.

There is a commercial angle too, and it is worth being plain about. Platforms that handle your payments generally take a percentage of them, on top of what the card networks charge. That is a reasonable trade for a service, and it is also a permanent tax on every future sale you make. It is worth knowing which arrangement you are in before your volume gets large enough for the difference to matter.

Staying entirely inside one platform versus writing there and selling on your own page

This is not a migration in the dramatic sense. Nobody is asking you to abandon a publication you have spent two years building. It is about where the transaction happens and who holds the record of it afterwards.

Doing the move

Allow an evening. Most of it is deciding what to sell, not moving data — the import itself is a few minutes.

1. 1Export your subscribers from your newsletter platform's settings as a CSV. The exact wording of the menu moves around; look for exports or subscriber data.
2. 2Open the file and check it before doing anything else. You want the email column, any name column, and no stray header rows.
3. 3In your store.fan dashboard, import the CSV into your customer list. From that point the list keeps building itself from every purchase, membership and free claim, without you maintaining it.
4. 4Build one product before you tell anybody anything. The obvious first one is whatever readers have already asked you for twice.
5. 5Add a free download as well, priced at zero, so readers who are not buying today still have a reason to arrive and be recorded.
6. 6Set your storefront up properly: cover photo, a bio line that reads like your newsletter sounds, and a theme that does not fight your writing.
7. 7Write one issue that explains the change in plain terms — what you have made, what it costs, and that the newsletter itself is not changing.
8. 8Add store.fan/you to the footer of every future issue and leave it there.

What the fee difference actually looks like

Work it through with a deliberately modest example rather than a projection. Suppose you have a couple of thousand readers and you publish a paid guide. Pick a pessimistic conversion assumption — say one in a hundred readers buys — and a price you would genuinely charge. That gives you a number of sales you can multiply out on the back of an envelope.

Now apply the two arrangements to that same number. With a percentage platform fee, a slice of every sale is gone before it reaches you, and the slice grows with your success. With 0% platform fee on every plan, the only deduction is Stripe's own card processing, which you would pay in any arrangement, and the money arrives in your own Stripe account rather than being held for you. The difference on a single guide is small. The difference across three years of a growing readership is not, and it is entirely predictable, which makes it the easiest kind of decision to get right early.

The mistake most people make

They announce the storefront before there is anything on it. A post that says "exciting news, I have a shop" followed by a page with one placeholder product spends the goodwill of your best-read issue of the quarter on an empty room. Build the first product, add the free one, get the page looking like you, and then write the announcement — ideally as a normal issue that happens to mention it, not a launch. The other mistake is quietly assuming that people who read for free will not pay. Readers who reply to your emails have already done the hard part; nobody has ever offered them anything to buy.

Two years of Sunday mornings is a real asset, and the only thing missing is a place for the people who keep asking to actually buy something. Move the list, build one product, mention it once. If you want to check the mechanics before you touch anything, the FAQ covers imports, payouts and what sits on each plan.