1. Ghost, a Substack rival, has announced the launch of its federated newsletter feature. This feature allows newsletter authors to publish their content on their own domains while still being part of the Ghost ecosystem. This decentralized approach gives authors more control over their content and audience.

2. The federated newsletter feature is built on the ActivityPub protocol, which is the same protocol used by the decentralized social network Mastodon. This allows Ghost newsletter authors to seamlessly integrate their content with the wider Fediverse, a network of interconnected social media platforms.

3. The launch of the federated newsletter feature is seen as a significant step towards a more open and decentralized future for online publishing. It challenges the dominance of centralized platforms like Substack and offers authors a more autonomous way to build and engage with their audience.