The admin of kbin.social has had to put the site behind DDoS protection to cope with the load the site is experiencing. Unfortunately that self-same protection breaks the site's ability to Federate properly, so for the time being kbin.social is effectively cut off from much of the Fediverse.
@Hikitile well, my previous comment here made it so I guess it was just a temporary thing? Actually, I wonder if there's a difference between top-level comments and replies to other comments.