2 Name: Insignia : 2013-03-30 10:22 ID:Bzo7vgX/ [Del]
There's no need to signup and we go by our Names (And Id which is that gibberish letters at the side) and there's no "Original" dollars website. It's just other sites that's similar to each other.
There is one which you can find here : http://drrrchat.com/
(Please note that this site does not own it and belongs to a Japanese guy who made it so if there's any problems, we can't help.)
For the last question, I don't know how to answer that.