@jakub_neruda A few links for you. TL;DR: Substack deliberately hosts pro-Nazi content and even sent a push notification for one such newsletter completely with a swastika.
The founders have repeatedly refused to take this content down in the name of “the marketplace of ideas,” or really just their revenue.
https://www.theguardian.com/media/2026/feb/07/revealed-how-substack-makes-money-from-hosting-nazi-newsletters
https://www.theatlantic.com/ideas/archive/2023/11/substack-extremism-nazi-white-supremacy-newsletters/676156/
https://arstechnica.com/tech-policy/2025/07/substacks-nazi-problem-wont-go-away-after-push-notification-apology/