Local journalism, at its best, is part of a feedback loop. Council makes decision -> local reporter writes about it -> public reacts -> council changes its mind.
Can a Patreon or Substack journalist play that role?
When coupled with “posts it on local subreddit”. Yes.
Absolutely yes. It’s happening every week of the year with the better Substack-style startups in the UK (London Centric, Manchester Mill etc.).