An experiment in bitcoin distribution and single source of truth is a project designed to distribute bitcoin to people who may not be able to purchase it.  See Currency creation requires thoughtful distribution.  Subscribers earn satoshis for opening one daily email.  The emails have survey questions, ads, bitcoin lessons and other fun content. Subscribers earn more satoshis per email by building out their profile. The emails are personalized based on the profile. Over time the profile can become the single source of truth about the subscriber. Subscribers will have control over this information just as they have control over their money with bitcoin. Try it out.