Best advice out there.
The the best way to build a data business is to publish data in some niche that no one is currently focused on, create a cadence of content and evangelize the data in a way that people track and start to care about (articles and videos that tie it into other topics - ie economics, markets, current events).
That is how we built SONAR into the terminal for the global supply chain.
This has long been my advice to a young person looking to break into journalism.
Three steps:
1) Find some public data that most people are ignoring.
2) Really learn what it measures and how to aggregate and present it.
3) Through posting, become the expert everyone turns to.