I am not sure about that , but I know they block p2p and they compress images (HTTP) , so that it downlaods faster. There is no way to stop it , their server does that for you (unless you know how to toggle settings)

DiGi EDGE does not block p2p nor compress any images . Its maxis , they block p2p and compress image (They have a proxy server , so if someone goes thru Yahoo , the proxy stores everything there and then sends the same copy to everyone else (assuming the site is not updated or changed) , so that it loads faster)