It's growing like gang busters, that's for sure. Does anyone know a way to measure active users? For example, how many have logged in the last month. I suppose logins are not registered on the block chain, but all actions are: posts, comments, upvotes, etc. It would be interesting to see whether active users is growing. That is the important metric. If the rate of attrition is greater than the rate of sign up then that is obviously not so good.