@barrystein - yes, quite lonely. I still have to spend some time to figure out how it works. Not sure how to reply to your post, like it, acknowledge it, etc. Other than ad free, what does it want to be that FB isn't?
Over 1 Billion users is a significant barrier to entry for any other social network. I think the rest will have to settle for niche networks or fringe status. People are resistant to change in general . . . trying to get them to switch social networks is going to be a tough sell.