Once again I am away during an important alpha, hoping I won’t miss it!
I think it runs for as long as people hold up servers for it.
Like, once you have the client, all you need is servers. And if the players have that, the game lives as long as people have interest or until a newer version releases
From what I’ve gathered talking to developers it’ll be up until around official Early Access release as it’s going to be used to incrementally test things. Don’t take my word on it though.