yeah it's also in their best interests to protect their property from theft. A C&D letter doesn't cost huge bucks and why would they need to go after every pop up? All they need to do is go to the courts and have it decided illegal once to put the law on the books. Cloud hosts aren't going to permit any future pop ups to run pirated software on their servers and are basically enforcing the law for NCSoft at no cost to them. sure, they won't stop everyone from running a private server in their home or parent's basement, but that isn't going to have a huge community of people. more likely be a secret underground operation just like this one was until someone spilled the beans.