We come here in search of a place to express our thoughts outside of the direct control and surveillance of unaccountable, mega-corporations. There is no common theme that binds us other than these being the bonds we've chosen rather than those that have been chosen for us.
Apparently it's back to the pattern of a video coming out on each channel around the same time:
https://www.youtube.com/watch?v=D1N4XekNNME