its not just you, and theres a real reason for it. the substacks that blow up writing about substack are basically doing the "teach people how to make money" meta-niche, their audience is other substack writers, which is a huge high-intent crowd thats already ON the platform and dead easy to reach. so it self-selects, the people who grow fastest are the ones whose whole topic is the platform itself. survivorship bias with a built-in audience
the catch is that niche has a low ceiling and its crowded, so posting "random stuff" isnt wrong exactly, you just need a reason for someone to subscribe besides "i like this person"
5 things that actually seem to matter:
- pick a niche with an audience that isnt just other creators
- one clear promise ("subscribe and youll get X every week"). random stuff is the #1 growth killer even when its good, cause nobody knows what theyre signing up for
- consistency beats quality spikes, same day every week
- substacks native discovery is weak, so you need one outside channel feeding it (notes, x, reddit, wherever your topic actually lives)
- the recommendations network is the real growth engine, getting 2-3 adjacent substacks to recommend you is worth more than any single viral post
honestly id niche down to one lane for like 3 months and watch if the subscriber math changes. the "random stuff" is probably the thing capping you