Can this map be better understood as groupings of users? It seems that a lot of the categories that are polyphyletic so to speak - programming grouped with science, Italy and Spain between China and Japan - make sense if you just think of them as overlapping groups of users.
More specifically, the groupings would be user accounts (this distinction is important for understanding Porn Island).
From the info section - "Two dots within the same cluster are usually close to each other if multiple users frequently leave comments on both subreddits."
More specifically, the groupings would be user accounts (this distinction is important for understanding Porn Island).