StenDuring I figure it is iffy because it is not completed or dead. It is ongoing, but not on WN.
Also, some authors only publish once a month. If someone is doing something for free, then you can't expect them to explain anything to you. Of course it would be nice if they did, but they are under no obligation to.
It takes a lot of time to write. So if they are busy, you can't expect them to do anything. They have lives, jobs, etc. Many people digest what the authors do and are thankless. They only think "Man, why can't they update faster?!" Writing for many authors is a hobby. You can't just say, "Hey buddy, you aren't publishing fast enough. You need to discontinue your writing." If that was the case, then Game of Thrones would have been discontinued a long time ago.
Also, tagging something as dead would mean that people would stop reading it, probably. Why? What does that do? All it does is make the author think, "Why should I bother publishing at all? No one likes my work." Just enjoy your free reading. If it bothers you, then make up what the ending is on your own.
Now if you came up with excuses for why it should be tagged as "dead," then all you have to do is be an intelligent human being and look at the latest published chapter. It tells you when it came out. Then you know if you want to read it or not. But, I suggest looking at the reviews over that. If people enjoyed it, then what's the problem?