{"about":{"summary":"A directory of side businesses that real people say they run, each summarized in our words and linked to its public source.","notes":["Sources are public, first-person accounts: interviews, podcasts and community threads.","Cost, time and the other tags are machine estimates, each with a confidence score.","Income figures are the owner's own claim. We don't verify them."],"how_to_cite":"Link the idea page and its source. Call income figures the owner's unverified claim, and cost and time estimates."},"idea":{"slug":"niche-newsletter-funded-by-sponsors-717cdb","title":"Niche newsletter funded by sponsors","summary":"A free newsletter grows an audience and sells sponsor placements to advertisers. Subscriber growth is helped by paid ads and referral tools.","url":"https://allsidehustleideas.com/ideas/niche-newsletter-funded-by-sponsors-717cdb","markdown_url":"https://allsidehustleideas.com/ideas/niche-newsletter-funded-by-sponsors-717cdb.md","tags":{"category":{"value":"content","label":"Content and media","confidence":0.95},"earns_from":{"value":"sponsorship","label":"Sponsors and donations","confidence":0.94},"startup_cost_estimate":{"value":"100-1k","label":"$100 to $1k","confidence":0.41},"time_estimate":{"value":"part-time","label":"Part-time","confidence":0.51},"where":{"value":"online","label":"Online","confidence":0.99},"needs_coding":{"value":false,"confidence":0.98}},"owner_reported":{"text":"Self-reported by Chris Koerner: newsletter six figures of profit, grew from 77K to 240K subscribers in 2025; referral program high five figures a year.","verified":false},"source":{"publication":"The Koerner Office","title":"My 2025 Profit Reveal: A Full Breakdown of Every Income Stream (Ep. #261)","url":"https://www.iheart.com/podcast/269-the-koerner-office-busines-122703944/episode/my-2025-profit-reveal-a-full-breakdown-of-every-income-streamep-261-315163124/","person":"Chris Koerner","host":"Chris Koerner","date":"2025-12-30"},"owner_site":null}}