Kierunkowy74

Flohmarkt

It's this account

You can follow him from kbin.social

1. But I still browse by "all".

Interstellar for Android, but then your instance is kbin.earth.
kbin.social has not opened yet its API.

Or simply use a website as PWA.

No. It is a version of Mastodon available on some instances, like infosec.exchange or mstdn.ca

rel

Up- and downvoting the same comment of yours at the same time? This is illegal! /s

kbin.social federates with Threads

On Mastodon it is possible, when an instance (like Threads) is limited. Limiting is not outright suspending, and limited instance still federates, but its posts and users are not visible unless you explicitly search for them. Also, no one from a limited instance will follow you unless you approve them as a follower.

/kbin crossposts are displayed as smaller, like on image (if you can see it :))
Edit: you can't. Click fediverse logo to see it on /kbin

/kbin has got Collections, and PieFed has got topics. You may check either out.