I have noticed that there are various categories of Profiles called Newbie, Novice, Fledgling, Greenhorn, Apprentice, Associate, Journeyman, and Analyst. What are these?
These are the various classes of profiles you pass through on successfully completing certain tasks that give you more privileges. You should go to the achievements page to check out the requirements of each class and the achievement you will get for getting to the various classes of profiles. For example, no one can own more than 50 virtual shares in a new user and, in return, a new user will only be able to hold 50 virtual shares in someone else. Over the length of a week, as long as a person is actively trading and/or being traded, they can rise through the user categories and unlock the ability to hold up to 200 virtual shares in someone, and for someone to hold up to 200 virtual shares in them.