They have servers everywhere. China, Luxembourg, Germany, Netherlands. One day, you can see that their IP location is in China, one day Luxembourg, and other Germany. They probably have some script to randomize IP's, e.g. If China has too many requests, it switchs on Luxembourg or Germany. I'm not saying that they're doing it (or that what I'm saying is possible), but that's only normal explanation. Otherwise, why would they do it? They deal with copyright organizations normally as they have a lawyer.