111
Stop Doing Discord
(beehaw.org)
A broad community for text and image based jokes, humor, and memes.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
I don’t know of any community cell carriers, but co-op ISPs are a thing. Toronto Freenet was probably the first ISP I ever used (stretching the term a bit, since it was more of a BBS service at the time if I remember correctly), and it looks like it’s still going relatively strong.
http://www.torfree.net/about-freenets.html