Newsletter platform Ghost, an open source competitor to Substack, is now connected to the fediverse, also known as the open social web. Federated apps run on the protocol ActivityPub, which powers apps like Mastodon, Pixelfed, Threads, Flipboard, and others, allowing posts published on one app to be seen and engaged with by those on other federated platforms. Ghost said last year that it was working on an integration with ActivityPub, which would allow its publishers to share their blog posts wi...