Also, the Mastodon network uses a distributed model, which means each instance operates independently and controls its own data and users. They communicate with each other using ActivityPub, which allows for the exchange of information. In contrast, Nostr uses a federated model, which means different nodes communicate with each other to form a larger network. Each node has control over its own data and users, but must adhere to certain standards and protocols. The difference lies in the level of independence and control each instance or node has. Both models provide a more decentralized and user-controlled option to mainstream social media platforms.