isiloron

There is a feature request at kbin's repository regarding this feature.
I have added feedback to it personally.

There are ideas for users grouping together communities/magazines (from kbin or Lemmy or others) for themselves, and for moderators of magazines to include other communities, or even for admins of instances to group communities together at a site level.

Here is the documentation for server to server delivery in the ActivityPub protocol.

I think you are correct. If there are recipients in the "to", "cc", "bto", "bcc" and "audience" fields, the activity will be delivered more quickly. Mentioning someone in a post is a way to add a recipient.

• Heaven's Vault: Language translation point and click adventure game.
• Project Hospital: A great hospital sim. You can even diagnose the patients yourself!
• Sakuna: Of Rice and Ruin: A japanese RPG/brawler with a (very detailed) rice farming simulator as the way to gain XP to level up.
• Warsim: The Realm of Aslona: A text based kingdom manager / adventure game. Full of quirky details and humor.
• THE LONGING: A very very slow paced point and click adventure game about waiting... for 400 days... in real time. Why not read some books while you wait, or come out of your little hole and explore the caverns outside?
• Cultist Simulator: Run your very own lovecraftian cult, the card game!
• Windward: A pirate sandbox akin to Sid Meier's Pirates! Tried it on a whim when I got it in a bundle and got stuck playing it for 15 hours. Worth a try.
• Shadows of Doubt: A procedurally generated detective simulator (in early access at the moment).
• Ruinarch: A big bad simulator sandbox. You are the big bad. See that village over there? Make their lives miserable!
• Ghost of a Tale: You are a mouse bard in a fantasy world of anthropomorphic animal people. You are imprisoned in the castle dungeons and need to escape.
• Heat Signature: A space bounty hunter sandbox. Hijack a ship, kill your target, collect the package, throw yourself out the airlock, and pick yourself up by remote controlling your ship.
• Intergalactic Fishing: You like fishing? Do you want to fish an unlimited amount of different fish in an unlimited amount of different lakes all over the galaxy? Look no further.
• The Last Federation: You are the last surviving individual of a powerful species in a star system full of different species at different levels of technology. Your mission: unite the star system to save its people from annihilation. Will you be able to unite all of them, or will some species be eradicated for the greater good?
• Songs of Syx: A fantasy city builder of grand proportions. Build your kingdom's capital and fill it with hundreds or even thousands of individual people.
• 5D Chess with Multiverse Time travel: Are you good at chess? Well, everyone is on a level playing field when you introduce time travel and the multiverse.

Well, there is this:
https://kbin.social/awards

Doesn't seem to be an active feature right now though.