They've all struggled because they don't pay contributors. It appears as though the media companies don't pay contributors because these companies haven't been happy to pay them for content which has not been vetted, uninteresting, or has not been provided in a timely manner. How can any of NWZ's competitors expect to generate quality content if they won't incentivize people to go above and beyond to get the best stories? Money is a strong incentive after all.
NWZ appears to be addressing this and is offering something that appears to be commercially appealing to both media companies and contributors.
