RSS is a format, not a service, not a website, not an app, nor a kind of network. He would not use RSS. He would use a software that might also output a kind of

RSS is a format, not a service, not a website, not an app, nor a kind of network. He would not use RSS. He would use a software that might also output a kind of newsfeed. This software would need to run on or feed to a server, which would need an IP and a domain. This would need to be secured against malicious and legal attacks. Meaning there needs to be someone hardening and maintaining the setup. And in the first place RSS has no feedback-option, to get the whole twitter-experience and build up his echo chamber.