I probably post there more than on HN.
If you're talking about where I share posts... a combo of Facebook and LinkedIn.
X banned my only account that I hadn't accessed in over a year and refused to unban it, as their unban process is only automated with no manual reviews, so I'm not interested in trying to rebuild my followers. Fortunately, Twitter aided in growing my audience to around 2 million visits a month, which has since grown to 3 million without it, so I rely on my visitors to keep sharing their articles to their own Twitter accounts.