Ning passes 200,000 social networks
blog.pmarca.com
blog.pmarca.com
I created a private network for my family a while back and thought I'd invite everyone but I got frustrated with the post-setup and gave it up. I probably should probably try again and send in some feedback.
I do think 70% active after 30 days seems good. I wonder what the drop-off is at 60 and 90 days though.
Any idea how much money all this is bringing in?
I am not convinced that letting others create free social networks is a good market to be in.