Since launching in 2017, Substack has emerged as a publishing platform for writers looking to monetize their work through paid newsletters. However, as the platform has grown, so has its content. In November 2023, a report from The Atlantic revealed that while Substack’s approach to content moderation banned pornography and spam, it allowed Nazi-supporting and white supremacist newsletters on the platform, including some with paying subscribers that generated commissions for Substack.

These findings led more than 200 Substack authors to sign an open letter asking why the platform is letting those newsletters publish and monetize that kind of content.

Here’s the story so far.