Think about it George, this server exists in a legaly ambiguous area. It's already survived one closure. This rule, which is hard to enforce, sends out the message, that though the server exists in that ambiguous area, at least it's leaning towards the side of legal versus, "Before you play on our server, stick it to the company that legaly owns this game by downloading it from w-w-w.illegalwares.tk.ru.cn." This server would be down sooner than later if Sony ever caught wind of us promoting the latter or even perhaps abusing their system, i.e. the free download.
My $.02