They no longer die in millions. However, a majority of them are still in border-line starvation. If you look at some pictures of ordinary people taken by outsiders, you can tell that their situation is still dire.
Do they still maintain a network of prison camps in which babies are born to prisoners and grow up in prison, as prisoners?
Yes, they do. Recently words got out of NK via defectors about prison camps. Satellite pictures are taken and published. Such a high profile publicity apparently drew NK regime's attention. Some known prison camps were torn down. No way to tell what happened to prisoners inside. Were they dispersed to other camps or simply liquidated? No words on this question yet.
So basically the posted article is a variation on the “Hitler was kind to his pets” genre of news stories.