Everyone with a little bit of technical knowledge can set up their owner server, also called an "instance".
Users sign up for a instance and get access to the communities created on the instance they signed up for but also to the communities of other servers because they can communicate with each other.
The big advantage is that it's not a walled garden. Unlike reddit where one company controls everything, if someone here we're to pull a "Spez" (what Reddit did) they would be laughed out of the room because each server is owned independently.
Currently there's two popular softwares to run these servers: Lemmy and Kbin. But that's just a program that server owners run. I believe there's currently over 300 servers that are running one of these softwares to create this distributed social network.
They are potentially viewable by admins since they're not encrypted end to end and are stored in the database. It's why there's a warning message when you try to send someone a DM.
Unfortunately there's probably a large amount of users who simply don't care.
But that's okay. What matters is content creators, not content consumers. Anyone with half a gram of decency and self integrity will have realized that they need to take steps to move away from Reddit.
I was 12, I think, when I got my first phone. A Nokia.
I was mortified the first time it happened. Then clack-clack-clack I was taught to put it together again.
Hooray!
Younger generations will finally be able to experience the joy of dropping their phone and having to pick up three to four different pieces! /s
I'm running things on a dedicated server with proxmox as hypervisor on OVH. Hard drives are two SSDs on a RAID-1 setup.