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Finn Tropy's avatar

Thanks for the shout-out, Karo — and wow, this is a thinky piece. You clearly put real time and brainpower into it.

Substack’s architecture and product design are absolutely worth studying, and what’s wild is how much of it creators never even see in the UI (yet). I’ve spent the last 14+ months poking around their undocumented backend APIs, and honestly… every debug session feels like opening a Kinder egg. Always some new surprise inside.

Your take on the business model and discovery mechanics really lands. Relationships matter way more than people want to admit. Right now, recommendations are driving about 2× as many subscribers as Notes, and I’m seeing the same pattern across other creators too.

I especially liked your point about trust taking time. It naturally kills off “guru mode” and rewards “build in public” behavior instead — more touchpoints, more context, more real signals that a creator is actually doing the work.

I’m saving this one because it’s the kind of post you have to reread to fully digest.

Thank you for writing it 🙏

Karen Spinner's avatar

Thanks so much for the shout out! I trust you enough to recommend your work without reading it…although I always read your posts because they’re great! 🤗

Agree that Substack has a unique model for encouraging publications to reward readers over advertisers, and I’m curious how or if this might change as Substack rolls out its sponsorship network. 🤔

Also, Substack really needs to make tax and compliance easier for small creators…saying this as I look into whether I need to register as an EU business entity and pay VAT tax on my handful of paid subscribers in Europe. 🫠

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