O.k. here's the test:
1) Click the Ibill revshare link below
http://secure.ibill.com/cgi-win/ccar.../complete.html
2) Go to the Ibill's sign up page.
3) Check the source code of Ibill's sign up page (right click "View Source Code")
4) Search for INPUT TYPE="HIDDEN" NAME="REVSHARERID" VALUE=""
5) Post if you see VALUE=""> or VALUE="mb123">
Thanks for taking part :-)