Hubpages is a different kind of 'society' to social media - like Facebook and Twitter. There you can communicate to friends and acquaintances by chatting, commenting, posting links and playing games.
Hubpages is for people who love to write - not everyone can or wants to do that.
You can post questions, forums and a status on HP, but those who have signed up for accounts generally have their profile and at least one hub.
I would love my friends to join here and start writing but a lot of people I know are either too busy, or wouldn't know how to begin. Checking into Facebook now and again to see what's going on seems a much simpler option.