kilioa and fedia are kbin as well! They're just different instances than kbin.social. It doesn't really matter which kbin instance you sign up for, you can see content from other instances as well.
And kbin.social definitely can still work out--when the dev figures out the best way to move forward without cloudflare, he'll disable it so kbin.social can federate with lemmy instances. It's just not working at this time.