Before I start with my own data collection, let's take a look at the data @Gargron published half a year ago (https://gist.github.com/Gargron/48e67b1b14723cd178c951fe7f373a38).
pawoo.net and mastodon.social were clearly the most connected instances.
On average each instance was connected to 175 other ones.
At the top in violet are several niche instances. I would say the only thing they have in common is the non-technical focus. 17%.
Searchable (ctrl+f) SVG without lines to keep the filesize reasonable: https://lucahammer.at/vis/fediverse/2018-08-24-fediverse-min.svg
If you compare it with the screenshots, keep in mind that it is mirrored.
Beware of over interpretation. This is no scientific work. It's just one way to visualize instances. There are many others and probably better ones.
Qualifying the connections by amount of follow connections could draw a different image.
In the end it's not important for your everyday use. You can follow every account of every instance (as long as your instance doesn't cut ties with the other one).
Most important are the people you follow and what you toot.
I tried to clean up the script, but it's still messy. Feedback welcome: https://gist.github.com/lucahammer/eb68fc43a34877a304e7b81e5f729c4b
Data as GDF from yesterdays visualization (zipped, 10MB): https://lucahammer.at/vis/fediverse/2018-08-24-fediverse-GDF.zip
@Luca People, there's work to do! We're in the middle of the "niche instances" with a "non-technical focus"... 😟
@hiemstra It's easily possible that my quick interpretations are wrong. Niche is a rather broad term. And I would say it's a good thing.
@Luca I think it's pretty accurate (but we're supposed to be a technical university, so...)
Nice work, BTW!
@Luca How did you differentiate between the violet cluster and the others? I can't believe all the instances in the orange cluster are tech focused for example.
vis.social is an open social platform for creative people, especially anyone in sciArt, data, visualization, creative coding, and related arts and research. English is the common language of the instance.