Currently, we have somewhere around 8000 users, so definitely a small corner of the internet, but I can't really say how many people are on at any particular time. Of course we appreciate any users who is promoting Hubski to their friends and acquaintances. Spreading by word of mouth is all we've ever done, so keep it up! We've never tried any advertising or promoting, because we like the people we attract naturally, and we feel like active promotion might attract the wrong crowd. Even 8000 we're proud of right now, because when mk started Hubski (I think in early 2011) it was just him, his wife and a few buddies. Our main growth spurts have happened when well known redditors have made a post about or at least mentioned us, notably syncretic and kleinbl00. Such is the power of Reddit. Of course, even though we love this place how it is, we would love it even more if we could grow by another order of magnitude. I think then it would be a really self-sustaining place.