SIWN (Sign-in with NFT), as an infrastructure, is more in line with the rights and interests of users than the traditional account system, and provides a large number of use cases for NFTs.
NFGate is an example of an implementation of the SIWN protocol. Here, the presentation and management of NFTs is centered around the purpose of making any NFT of a user available as an account.
NFTrust.cc is a social application based on NFgate (an instance of SIWN protocol). Different NFTs on different chains are separate accounts, and they can establish social connection with each other. Posts and Commits are sent based on NFTs.