Well...
If we are talking about pure CCBill program:
http://refer.ccbill.com/cgi-bin/clic...XXXXPA=XXXXXXX
may always count your click (unique or not), set CCBill cookie and redirect the surfer to the default for CA location.
HTML=http://whatever-domain.com/something parameter
is redirecting surfer to specified location
(BUT only if that parameter was allowed by program owner,
otherwise surfer will be redirected to the default for CA location)