I make my money bootstrapping companies like a remote job board called Remote OK (~$10,000/m) and Nomad List, a social network (~$20,000/m) and Hoodmaps ($0 still) that lets you find neighborhoods to stay. The majority of users come from my companies/apps (not me!) being covered on Reddit, HN, Product Hunt, and mainstream press, not my blog.
I have a book about bootstrapping startups that’s completely unrelated to digital nomads that makes $1,500/m in pre-orders, so that’s 5% of my revenue. Hardly a blip in terms of overall revenue and not the goal of my blog (I’ve had this blog for 7 years).
I write about anything from building code projects like https://levels.io/hoodmaps to dealing with my anxiety http://levels.io/anxiety to logging my travels https://levels.io/los-angeles.
In this case, I received a message of someone on Twitter who asked me what would I do if I was 18 now, that’s why I wrote it. It’s my subjective perspective.
Not really any different than today's video courses on how to get rich by making instructional videos.
In both cases, for some people, it does indeed work :)