Pretty sure you’re interacting with a spammer. Look at their posts, they all have this robotic ad-reading discourse and link back to one of their websites.
Alternatively, they have had multiple past submissions on personal projects that have done well on HN, often (but not always) interact, and have English as a second or third language.
Is sharing now the new spamming? If I just say Cling people will have no idea what I mean. If I leave a link, people either will click and find something useful, or at least get some context on what I'm talking about or move along.
I get that we have to be skeptical nowadays with all the bots, but I would never have guessed that my day to day writing will be taken as robotic ad-reading.