content: Mastodon is an open source platform (back end code), Social Galactic is a social network (like Twitter or Gab) that may or may not be running Mastodon. Social Galactic is run by infogalactic (aka that creep Vox Day and his ilk).  For reference: Vox Day is the dickhead that famously claimed that if somebody calls you a name you should call them a pedo right back.  Somebody did exactly that to Vox Day on Gab and VD sued Gab to dox the user that called VD a pedo.