I really should have added a link to a Wired article that features the German founder of Mastodon:
Wired link
What is interesting is that this is a distributed Open Source system in which anyone can set up a server!
Wired Extract:
“…the Mastodon protocol allows anyone to use open-source software to boot up a server that hosts a Twitter-style community with its own rules. Together those servers form a collective of interlinked communities dubbed the “Fediverse.” People can join a server that matches their interests and community standards, but also connect with users on other servers, or block all content from a particular server completely.”