Your questions have been answered here repeatedly.
News media deemed her case newsworthy and her mother and family managed to keep the case in the forefront. BRAVO to them. I wish them God speed and hope that the case is eventually solved, and sooner rather than later.
What's interesting about the whiners is that for the past few months the only show that concentrated on Natalee was Greta. One hour out of 24 at 10PM. She stuck with the story when no one else was reporting on it.
As many folks here don't like Greta, I find it unconvincing that they were tuning in to her show in the first place. Which leads me to believe that they are either pretending, or just as interested in this story as we are.