Why did they post on X? Most of the people on there probably think HN is a Soros front. Also, why does it say twitter.com and not x.com? Would have been better just to post a link from their blog.
HN's software rewrites URLs back to twitter.com for two reasons: (1) people still call it Twitter colloquially, which is the real measure of what a thing is called; and (2) anything else feels weird.