NOTE: The username you choose will form part of the url of your classified adboard.
Now is your chance to pick a meaningful username. Use a keyword rather than your name.
Example: If the main program you promote is Team Profit, why not use "teamprofit" as a username?
Best if your username is lowercase like so: http://www.myfreeadboard.com/classifieds/teamprofit/
Search engines like Google give a little extra weight to URLs that contain a meaningful keyword.