I'm really impressed - and curious - about Priceonomics' ability to come up with such well-researched and well-written (getting both right isn't always easy) po

I'm really impressed - and curious - about Priceonomics' ability to come up with such well-researched and well-written (getting both right isn't always easy) posts on such a wide plethora of topics. Especially because the authors don't seem to be their staff (I could be wrong here). What motivates the writers to come up with content that must surely take a lot of time to research & write?