I'm not sure how Gather works regarding their News and social writers. In this article here, the author writes in a way that implies she actually spoke with one of the main subjects of the article. Maybe she did, but I suspect that she didn't.
When I write for a newspaper, I must attribute all my sources. I often write about music and musicians who have websites and yeah, I take information from the website when needed. But I say so in my article.
Once, I missed an attribution and the assistant editor checked in with me about it. The word-count on my unattributed quote was maybe ten words long, but she spotted it and didn't let it slide.
So why does Gather not have a policy regarding these situations? The Social Writers are getting paid--not a lot, but they are getting paid. Therefore, I expect them to follow the rules of journalism and give credit where credit is due.
I regularly share articles over on Facebook, but not these News articles because I don't have confidence that they are thorough and accurate. They are sub-standard, often, and I won't share that sort of thing.