I'd like to know this as well. Nothing against them or their articles, they are usually interesting and well-written - but I did wonder why they show up on the frontpage so often. (They are a few other authors like that, like rachelbythebay).

The articles are good, but I don't think the findings are substantially more unique than what probably many other people in tech are experiencing.

I don't think there is some big conspiracy behind it, but I wonder if it might be the result of some algorithmic feedback loop: The system knows those sources as valuable, so posts reach the frontpage often, so people upvote them often, so the system registers them as even more valuable, etc...

That or there is some bit of HN lore that I don't know. In which case I would be interested in learning :)