Because various users of it keep posting links to it all over the web, and that's how Google's ranking engine works. https://en.wikipedia.org/wiki/PageRank
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True, but the Google search engine algorithm isn’t just based on links to websites. Google does have its preferred and blacklisted websites. For example, a few years back mugshots were downgraded in search results.
Well, it's really hard to gather evidence on that kind of internal biasing of the information flow. I would not be the least surprised if it is later revealed in some lawsuit that Big Media have been systematically tampering with the news flow by tweaking the algos.