yes kbin.melroy.org (sorry about the kbin subdomain name, but changing the domain name will cause federation issues...) is indeed from me (Melroy). And since I wasn't creative the m in Mbin stands indeed for Melroy. Which is my first name. I was also a very active contributor of /kbin on Codeberg before the fork.

Disclaimer: Anyways, since I'm also developing, I sometimes do test some patches or run the latest greatest bleeding edge version from the main branch. Just saying :). Which might not always be the most stable haha. BUT!! You can you run & test the latest features, that is for sure. Haha.