Hello SLavender,
You may only have one account per person.
There are several ways someone can be placed in your downline.
1) You can refer them to any of the GDI affiliate pages encoded with your GDI username. Using mine as an example
www.website.ws/yourownlife (where yourownlife is my gdi username) will place someone in my downline if they sign up on that page. The same applies for all of the GDI affiliate pages as long as they include your GDI username.
2) You can have a person call 1.800.MY.DOT.WS (1-800-693-6897) where they can get more information about GDI. However, as soon as they call that number they will be asked for an access code which can be your GDI username OR your email address. If they cannot provide that information they are not allowed to continue further and must contact you for that information. (To see what I mean call the number yourself!)
3) You can sign up as a premium member and win the GDI lottery! (Had to throw that last one in there, it's always fun to win stuff!)
Hope this helps.
Vincent Parker