Unless you are running self-selected first party ads, _the ad companies do not trust you, the publisher, to not lie about proxied traffic_. Ths is one of the re

Unless you are running self-selected first party ads, _the ad companies do not trust you, the publisher, to not lie about proxied traffic_. Ths is one of the reasons they demand invasive, malware JS to run that loads Java, Flash, and all sorts of bullshit.