Just for me: at the first time i dont need a multiplayer. If everthings works fine in the singleplayer mode and they will be fixed the bugs, than you can start with the multiplayer. And i think they prepare right now to release it later.
Think about the costs for server etc.
They have a crowd funding campaign and the investors would like to see asap a working game. So it is simple to make a working game with singleplayer and later the multiplayer. It is not a special multiplayer game like BF oder COD. This way is better than a single player and multiplayer that not works correct (like BF4 at the beginning or GTA).
And with astragon you have a special simulation reseller.
Thats only my mustard and the important thing is: a working game 🙂