What Script are these people using

this website

gdigoldrush.ws uses a script so when someone gets added they get a unique member url so they can promo the same site like this..

hxxp://www.gdigoldrush.ws/?id=username

I am wanting to know what script is being used to do this..

thanks in advance!

Its something custom, its php programming. You connect id's to a database and that user has their own affiliate id to sign people up.

At least thats what it looks like

if you add a correct username for the business then it directs you correctly to the signup page for the business!