I post around a third to a half of the articles I write on my blog to HN – the ones I think people here will like. Sometimes they hit and sometimes they don't. Three weeks ago I wrote about Odysseus, a very ambitious larp, that was popular here:
https://news.ycombinator.com/item?id=43414992
And last year I wrote about my thoughts on The Sphere in Las Vegas:
https://news.ycombinator.com/item?id=40858165
As for things I disliked, I wrote about Tonight with the Impressionists, a VR exhibition in Paris:
https://news.ycombinator.com/item?id=40745133
I think you are saying that anyone posting a positive article about something you don't know about on HN is a shill, which seems quite strange. Sometimes people genuinely like things and want to share their thoughts on why.
My final note is that Blue Prince is not a relatively unknown indie game. It was included for free on PS Plus and Xbox Game Pass at launch – quite unusual. It was also previewed by quite a few publications and is almost certainly going to be shortlisted in a lot of game of the year lists.
And to be clear, I have not been paid to write this article. There are no incentives involved whatsoever.