To the people that think it is not stealing, I guess they have never worked or created something important in their lives and see others use it without permission. I can understand the frustration of the time invested there, but still it is not a reason to talk shit to people stating the obvious.
There are too many people making money from this. Believe me, if Nost did not make money, they would have abandoned the project. Check reddit for relevant stories.
I have played in Nost as well for some time. I really liked the experience (mostly the community, this is what I miss from wow)! But the game was much worse than now or even WoTLK. We did not realize it back then when vanilla was the live server but it was a worse game. Anyway, it is sad to see the server go away but you cannot blame Blizzard for it.