Eula

Eula means End User License agreement. It is a legal contract between the manufacturer and the user that defines the use of a proprietary or free software. So it is done to prevent the set up of the software from others than the one who has signed the agreement. But this license is usually fewly read or printed. So, few consumers know what they are allowed to do. Therefore, it is not very efficient. Moreover, most of the people know that manufacturers cannot control if it is respected or not. So it is just for dissuading people from doing it.