Well what I discovered was that the posts that would get interaction were not always obvious to me. There are definitely some where you can know for sure people will be interested, but many posts I was surprised by either how popular they were or how much the post whiffed. It takes all kinds to make the world go around, I suppose.

I also think that it's just a matter of population. I do the same sort of thing with some smaller Canada-adjacent communities that I'm interested in, and while they get a decent amount of interaction in the form of upvoting and downvoting, they haven't hit a critical mass of population to start generating much in the way of discussion. This community only just seems to be capable of sustaining a decent amount as of hitting 2k subscribers. My hope is that as this community grows interested people will filter into those more niche communities and the same process that is happening here, will happen there, albeit more slowly.