Well, the link was broken, so I can't really judge not being able to read the stories, let alone their endings. Usually though, a story should end when the story has been told. That doesn't necessarily mean a "conclusion" or even a resolving has been reached, if that is the intent of the writer. It just means the story the writer wanted to tell is over. Some people like open-ended stories because that's how life is, it just goes on. Other people like the standard "the end" tales because they want the simplicity of "a beginning, a middle, and an end." You mileage may vary.
One way, writers make endings "satisfying", however, is by foreshadowing how the story will end. There are many techniques for this, using symbols, previous events which turnout the same way, etc. Then if the reader is smart, when the ending is reached they can say "I knew it all along." Personally, I dislike stories like that, but, what are ya gonna do? LOL.