If People are using this method to send to trades I doubt very much another trade script will count the traffic with the refferer let alone yours counting the in. except possibly cjpro sites and afew oters.
If the .jp or whatever surfer comes and is immediatley bounced to your out script his browser wont have enough time to pick up your reffering url so therefore your trade partner will count it as no refferer traffic.
am I wrong?
so unless you are using cjpro where it uses defined urls then you are getting free crap traffic
Muff