How Did We Get Here? The History of Twitter フォロワー 増やす Told Through Tweets
http://spencereoat868.lucialpiazzale.com/this-is-your-brain-on-twitter-forowa-maiu
Moreover, it's found out that there are also some registrar companies who require a notarized sort or other formal recognition documents, but they're just based on the selected county which the registrants resides