This has happened to me, I was testing what would happen if I removed my main domain. I couldn't join in with the main domain so I panicked. I contacted support.leet.cc and they said something like they won't give it back as they no longer give leet.cc which I think is not good because leet.cc is like a way of saying that the server is a leet server and would help advertise leet more and could maybe get more famous again.