I saw the following model work: offer a compilation of your best (or themed xyz..) articles for money. Add that you can mostly find these scattered on the site anyway. Very fair, and people would pay for getting an organized package vs clicking through random posts.
I am personally against it for my website in particular though. I insist on keeping everything on it open and free. Immigration advice should help everyone, not just developers with a generous relocation bonus.
I'd much rather invest the effort into making the content more navigable/discoverable. This is actually what I'm working on right now.
Again though, this is just personal preference for this specific website. Selling packaged information could work. I did buy a motorcycle travel book that was a rehash of the author's YouTube channel.
