WoW: Necessary or unnecessary?

As is known that if we wanna enjoy World of Warcraft, we have to buy WoW CD Key first. While what do you think of this, necessary or unnecessary?
In Asia, game companies do not require CD Key for registration. It is free of charge for MMORPG players to login in their games to enjoy themselves. Most of the games are free of charge. While in Europe and America, game companies demand game CD Key for registration. For example, if one wants to enjoy World of Warcraft, he has to buy World of Warcraft CD Key first. Then he used the CD Key he got to register to be a member of World of Warcraft. Then monthly, he has to buy World of Warcraft time card to pay for the game. Most of the games in Europe and America are not free.


An Asian may doubt whether buying warhammer cd key before enjoy World of Warcraft necessary? Or does it logical? May one sentence explain this for you: What exists has its own reason. So if you wanna enjoy World of Warcraft, you have to buy warhammer online cd key for no reason but you wanna it.