The visibility was increased with the promotion of your post.

I don't think it was promoted until it had >30, so maybe that helped a bit, but I have another visibility explanation:

I tend to stick around in my posts and obsessively reply to every comment and cherish every upvote, which means it gets a lot of visibility in the "recent comments" section. My posts tend to have lots of comments, and I think it's largely me trying to get the last word on everything. (until I get swamped and give up)

It is kind of odd that unpromoted posts in main have strictly less visibility than posts in discussion...

each individual still only casts one vote.
In short, you covered all your populist bases.

This is a good explanation. I get it now I think. Now the question is if we should be doing more of that?

EDIT: also, what does this mean:

talk about nomen est omen, nom nom