I've said it before, and I'll likely say it again: I write for me. Much like you say, passion is the key. I would be writing my D&D/TTRPG/Worldbuilding stuff offline even if I wasn't on HIVE (and in fact most of my drafting IS done offline these days), and I post for like... 4 people who read my stuff. Been doing it... five years now? Not about to stop, and I see a number of the folks I enjoy reading doing exactly the same. While we can earn here, it's best IMO to treat it like any other blog - love the stuff you make, and let it stand on its own.
and that way, you'll never run out of stuff to write about....if you love the content, you'll never stop!
Exactly! Often my biggest issue isn't deciding what to write about it's getting things to a place where I can feel good about the content I'm putting out. That's easier when I'm reviewing other folks' ttrpgs, but when I'm doing my own worldbuilding and such it's a balance of "is this complete enough to share?" and "is there enough context for anyone besides me to think 'huh, neat'"?