Piefed itself is just software. Anyone can spin up this software to run their own version of piefed. You are on the developer's instance, the flagship instance known as "piefed.social". So am I. You can see that in your url. The idea is that different instances of piefed can network together. So you can talk to people who made accounts on other servers with a different admin team.
The idea is that there is no single owner, so no individual point of failure or corruption.
Here are some other piefed instances here on the instance chooser.