Most experiments don't work.
Purposed social networks for scientists are a failed experiment. Don't take my word for it, ask Neil Saunders.
But if you're still in any doubt, I have the data to prove it, which came from a failed experiment called Small Worlds. Yup, I'm officially calling Small Worlds a failure. I learned a lot, but the approach was wrong. Fortunately, I have some ideas how to fix it (but I'm not sure they will be funded).