This is not a strictly commercial network.
Do we really need useless comments or posts just to increase some stats numbers?
I'd think about quality contents instead.
You can't have engaging conversations if there's no conversations. You can't have conversations if there are no posts.
I have been leaving comments as a way to tell anyone that I'm open to conversation for that topic, if anyone is interested.
And the thing about posts, whomever is doing the posting has already seen the content. It doesn't help the poster. For me, it's a new mentality that I actually need to share that info. Nobody else is going to.