I have some sales coming in but Im promoting my avs sites in a bunch of different places.
I'd really like to know where these sales are coming from so I can focus more time on that traffic source.

Is making duplicate copy sites for the different traffic sources the only way to do this?

I dont blame the AVS's, because they dont see anything until the surfer clicks the join form, but I wish there was a way of knowing where the sale came form.