There’s plenty of discusssion elsewhere on HN: you can use search to find references (I’d start out with author:dang paywall). Short short version: they’re (e.g

There’s plenty of discusssion elsewhere on HN: you can use search to find references (I’d start out with author:dang paywall). Short short version: they’re (e.g., NYT, WSJ, WaPo) big publications with a history of quality journalism that a lot of people are aware of and exposed to. That contributes both to increased submissions and upvotes.