--- title: Blog | Letterhead | Case Studies description: Case Studies | Unlock new revenue streams with Letterhead. Manage ad inventory, sponsorships, and monetization strategies—all in one execution platform. image: https://blog.tryletterhead.com/hubfs/Longer%20Copy%20Posts%20Template%201.png --- [![Letterhead logo](https://blog.tryletterhead.com/hubfs/Letterhead_Light_2025/logo.svg "Letterhead logo")](http://www.tryletterhead.com) - Platform - [Platform Overview Create, collaborate, and manage newsletter content across teams and brands](http://www.tryletterhead.com/platform) - [Production Build brand-safe newsletters with automated content ingestion and flexible templates](http://www.tryletterhead.com/newsletter-production) - [Portfolio Manage brands, teams, templates, and newsletter performance in one place](http://www.tryletterhead.com/multi-newsletter-management) - [Insights Work smarter with views on performance, cohorts, and content effectiveness](http://www.tryletterhead.com/newsletter-analytics) - [Monetization Plan, place, and report on internal CTAs and paid sponsor campaigns](http://www.tryletterhead.com/newsletter-monetization) - [Integrations Connect Letterhead with your existing tech stack](http://www.tryletterhead.com/integrations) - Resources - [Blog Exploring the future of newsletters with guides, best practices, and inspiration.](http://www.tryletterhead.com/blog) - [Compare See how Letterhead complements and compares to other tools.](http://www.tryletterhead.com/comparison) - [Support Guides, answers, and expert help when you need it.](https://help.tryletterhead.com/) - [What's New Learn about the latest product updates in Letterhead.](http://www.tryletterhead.com/updates) - Company - [About Us We’re a platform built for newsletter makers, designed to simplify operations and unlock the full potential of every edition.](http://www.tryletterhead.com/about) - [Careers Check out open roles and join us on our important mission!](https://ats.rippling.com/letterhead/jobs) [Login](https://app.tryletterhead.com/) [Get Started](http://www.tryletterhead.com/demo) - [Home](https://tryletterhead.com/) - [Blog](https://blog.tryletterhead.com/blog) - Case Studies [![](https://blog.tryletterhead.com/hubfs/Brown%20Minimalist%20Beauty%20Blog%20Banner.jpg)](https://blog.tryletterhead.com/blog/how-1440-scaled-monetized-4.5-million-subscribers) - [Creator Spotlight](https://blog.tryletterhead.com/blog/tag/creator-spotlight) - [Case Studies](https://blog.tryletterhead.com/blog/tag/case-studies) #### [How 1440 Scaled to & Monetized 4.5 Million Subscribers](https://blog.tryletterhead.com/blog/how-1440-scaled-monetized-4.5-million-subscribers) The 1440 Newsletter has emerged as one of the fastest-growing independent news publications in the country, landing in 4.5 million inboxes every morning (per their daily email). The founders, Tim Huelskamp and Andrew Steigerwald, built it without big media backing or heavy VC money. Instead, they fo... Posts about: ## Case Studies [Creator Spotlight](https://blog.tryletterhead.com/blog/tag/creator-spotlight) [Case Studies](https://blog.tryletterhead.com/blog/tag/case-studies) ### [How 1440 Scaled to & Monetized 4.5 Million Subscribers](https://blog.tryletterhead.com/blog/how-1440-scaled-monetized-4.5-million-subscribers) The 1440 Newsletter has emerged as one of the fastest-growing independent news publications in the country, landing in 4.5 million inboxes every morning (per their daily email).  [Read More](https://blog.tryletterhead.com/blog/how-1440-scaled-monetized-4.5-million-subscribers) ![Cameron Smith](https://blog.tryletterhead.com/hs-fs/hubfs/Letterhead_Light_2025/img-bio.jpg?width=45&name=img-bio.jpg) [Cameron Smith](https://blog.tryletterhead.com/blog/author/cameron-smith) [![Letterhead for emails](https://blog.tryletterhead.com/hubfs/Letterhead_Light_2025/logo.svg "Letterhead for emails")](http://www.tryletterhead.com) 12555 Biscayne Blvd Miami, FL 33127 - - #### Features - [Portfolio](http://www.tryletterhead.com/multi-newsletter-management) - [Production](http://www.tryletterhead.com/newsletter-production) - [Deliverability](http://www.tryletterhead.com/newsletter-deliverability) - [Insights](http://www.tryletterhead.com/newsletter-analytics) - [Monetization](http://www.tryletterhead.com/newsletter-monetization) - [Google Doc Newsletter Importer](http://www.tryletterhead.com/sync-with-docs) #### Resources - [Blog](http://www.tryletterhead.com/blog) - [Documentation](https://help.tryletterhead.com/) - [Help center](https://help.tryletterhead.com/) - [System status](https://letterhead.statuspage.io/) - [Newsletter glossary](http://www.tryletterhead.com/newsletter-glossary) - [Monetization guide](http://www.tryletterhead.com/monetize-with-advertising) - [Newsletter strategy guide](https://blog.tryletterhead.com/blog/4-point-newsletter-strategy-guide-for-publishers) #### Compare - [Letterhead vs Stensul](http://www.tryletterhead.com/comparison/letterhead-vs-stensul) - [Letterhead vs Beehiiv](http://www.tryletterhead.com/comparison/letterhead-vs-beehiiv) - [Letterhead vs Constant Contact](http://www.tryletterhead.com/comparison/letterhead-vs-constant-contact) - [Letterhead + Iterable](http://www.tryletterhead.com/comparison/letterhead-and-iterable) - [Letterhead + Mailchimp](http://www.tryletterhead.com/comparison/letterhead-mailchimp) - [Letterhead + Hubspot](http://www.tryletterhead.com/comparison/letterhead-hubspot) #### Company - [About us](http://www.tryletterhead.com/about) - © 2026 Letterhead, Inc  All rights reserved - [Privacy Policy](http://www.tryletterhead.com/privacy) - [Terms and Conditions](https://app.termly.io/policy-viewer/policy.html?policyUUID=bad62188-3b0c-49d3-8fd2-e11acf52b1e9) - [Cookie Policy](https://app.termly.io/policy-viewer/policy.html?policyUUID=e07716d2-5b8b-4013-9052-db6a2b5c5645)