Personally I don't like that they do that, not that they are pointing out that they do that.

Yes I should've said, people on HN don't like that they do that, or that it happens at all, but the reality is that it does and especially for people on a forum run by a startup accelerator in particular (with tons of Ask HN questions on how to grow their product via marketing), posting on social media is one of the most effective ways to grow, whether people like it or not.