@Arotrios @readbeanicecream @daredevil fwiw I can confirm that URUSAI! does not have any restrictions on kbin.social. And I'm able to load your kbin profiles from our Mastodon instance without issue.
I'd need to look into how the /d/ implementation in kbin works to know more.
But if you toss me the URL of a mastodon instance that DOES show up there without issue I might be able to learn something :)