a simple business is doing a paid newsletter. i see a lot of these going up... and it can be profitable fairly quickly.
also, doing anything in the education space is worth checking out... in other words, charging people for what you know is a well-worn strategy! an ecourse or online course isn't hard to put together... i did one literally with gumroad and notion docs!
I once worked for a very successful small firm whose primary product was a weekly email / newsletter: subscriptions start at around £20,000 / year.
Their product was analysis (energy markets), their customers were the banks / hedge funds, etc.
The analysis was provided by, um, analysts. These guys (and women) were Phd's, they were extremely well qualified and experienced.
Anyway you don't have to be a phd: the point is that if you have knowledge / expertise there may well be people who are willing to pay for it - the medium doesn't really matter.
also, doing anything in the education space is worth checking out... in other words, charging people for what you know is a well-worn strategy! an ecourse or online course isn't hard to put together... i did one literally with gumroad and notion docs!
https://news.ycombinator.com/item?id=22548620