Hi guys, I know this question is way past due, but I'm just wondering what is the difference between Postback tracking technique, Pixel tracking technique and iframe tracking technique. From my understanding, with pixel tracking technique basically we will piggy back on the network's image pixel and once that thing fire, our image pixel will fire as well, the same thing applies to iframe. But what about the Postback technique, I have never understood how that thing works, what is the pros and cons about the techique. Would any of you show me some light of your wisdom? Thank you in advance