Teardowns are a great way to take a look at how a business is operating and it's especially interesting when it comes to content marketing.
Freshbooks has some really amazing examples of this. They serve over 20 million users so I guess they're doing something right!
The article talks about their focus on SEO, but also about content that's a little more controversial and how it sparks discussion.
https://blog.storychief.io/freshbooks-content-marketing-strategy