That's really interesting! It shows which communities share users. I am part of jlai.lu, a french-speaking community that is relatively isolated by also slrpnk.net that seems very spread out!

Would it make sense to compute the standard deviation of each instance's communities? It would give an idea of which are islands and which are more extended. Not sure if it makes sense to compute it more on 2 dimensions or on the original 21934 though.

Does Walmart have a monopoly on kinder chocolate? The idea is to have several distributors each with as complete a catalog as possible. Having such a shattered offers between platforms makes it very noncompetitive against any piracy solution.