Its not for three different machines at the same time. They clearly state that you can register each unique hardware identifier 3 times, and after that you have to contact them to register again. That could mean 3 installations on 3 separate computers. Or it could mean 3 harddrive changes on one computer. I didnt say that after three times you have to buy a new copy -- just that after 3 times you HAVE TO CONTACT THEM in order to get it to work. They will "work with you to give you more keys". You are at their mercy.