How to track conversions when can't add full tracking code on 3rd party site? Only accept 1x1 pixel.
I have a website that sends links to 3rd party websites, on there the traffic either signs up or buys. Now I can't place conversion tracking on the sign up pages as the 3rd party site won't allow it but we can place 1x1 pixel tracking Server 2 server post back pixel Or postback pixel.
Basically we want to see what keywords results in sign ups on the 3rd party site and we cant use the large adwords conversion tracking script. Anyone any ideas it would be greatly appreciated thanks.
I've heard API scripts or something being built for us could be done but not sure where to start on this?