It can communicate with many other ActivityPub services, including Mastodon, Lemmy, Pleroma, Peertube.
I thought Mastodon (and maybe other federative platforms) are very different from kbin, in terms of the intended uses and functionalities. How do I interact with it?
When I make a thread on /m/kbin, what does it do on Mastodon?
Some updates. Apparently, making a thread in kbin will make a post on Mastodon, but not immediately. Here is the main page of my account on Mastodon (mastodon.social): https://mastodon.social/@CarrieForle@kbin.social
Under Posts tab, you will see this particular thread(https://mastodon.social/@CarrieForle@kbin.social/110717469552820707) and its replies. In contrast to my initial thought, posts on kbin seems to be ignored by Mastodon since I did not see my posts on my main page there.
On the other hand, Posts from Mastodon is transferred to posts (microblog) in seemingly arbitrary magazine on kbin, and again, not immediately.
If you dig a bit in that account, you'll see her posts are posted in different magazines, which is weird since there is no magazine equivalent in Mastodon. I'm guessing it's on kbin's side that does this transformation, probably with the help of hashtag?
Also, posts that's too old will not be transferred. I did not find this post on kbin: https://mastodon.social/@jensorensen/110204027397694156 . Based on the time when it's posted, it's somewhere between April 16 and April 23.