Connection methods for 8kun are listed on Jim Watkins' site, who runs/owns 8kun, if you wanna read up some more and try out the alternatives.

https://isitwetyet.com/8kun/

I dont think its a 'defeat shadow banning' kind of thing, to me it sounds like a distributed copy of 8kun that's both a local copy you can access to read and/or post on, as well as share out to others. So trying to make the whole website peer-to-peer in a sense, and more resistant to attack in being so. I'm really intrigued to check this one out ASAP as soon as its released!