When you filter the servers to open registration and up-to-date/not-abandoned, there’s actually a really limited selection of Mbin servers left (5 total). So I don’t think decentralization matters to much in this case. Those servers include: fedia.io, kbin.earth, kbin.melroy.org, moist.catsweat.com, and thebrainbin.org. There’s also gehirneimer.de for German language.
You can see the full list here: joinmbin.org/servers
Hey, I didn’t come up with it. You could ask @originalucifer@moist.catsweat.com though.