A plurality of vendors include a prescribed hyperlink protocol in their web pages to be participating web pages. The protocol included is the same for everyone, although the function and appearance of a resulting hyperlink varies. For a non-participating end user, the prescribed hyperlink forwards access to a sign-up site. For a participating end user, the function varies according whether the current web page is the referral web site start page, a referral web site non-start page, the privileged web site start page, a privileged web site non-start page, or another participating web page. For the referral start page, the hyperlink redirects access to the privileged web site start page. For the privileged start page, the hyperlink redirects access to the referral start page. For other participating web pages, the function may rotate to redirect access to the referral site or the privileged domain.