This is an extension of the old question How would interstellar internet work?. If civilization was spread over several different planets or moons (in the same system), and it took perhaps a few hours for signals to jump between clusters, how would social media like Twitter function? Twitter is instantaneous, it assumes everyone on it is on the same “page”, otherwise the concept of a twitter timeline (feed) ceases to be workable. So how would Twitter, or something similar in concept, manage to work in a multi-globe system? How would users stay in sync? What would happen if the distance, and thus the latency time, was increased to weeks or even years?
Some intrinsic attributes of a twitter-like social media to note:
Twitter is linear—barring its bizarre (and unpopular) algorithmic timelines, twitter users rely on the assumption that tweets show in the same order for everyone. The concept of “before” and “after” are vital as users react, and react to reactions, and react to reactions of reactions, and so forth.
Twitter is universal—Anyone can be on Twitter. When you follow a person, you don’t automatically know where they are, and in theory you can follow anyone (unless that person goes on private, but that’s on an individual basis). There are no structural factors that make one group of users easier to follow than another group. In contrast to a site like Stack Exchange (which is divided into various “communities” that you need to explicitly join), Twitter has no communities.
Twitter uses unique identifiers—as a result of the universal attribute, users on Twitter are assigned unique identifiers (@ names) since everyone is in the same “pool” and no namespacing is allowed.