You'd have a real hard time defending a copyright lawsuit under that model.
The legal key to their business (and to similar businesses such as CD ripping services) is that it is arguably fair use for the owner of a particular copy to make additional copies for his own personal use.
Given that, it is not a copyright violation for a third party (them) to provide a service to help the owner of the copy to make those fair use copies.
The legal key to their business (and to similar businesses such as CD ripping services) is that it is arguably fair use for the owner of a particular copy to make additional copies for his own personal use.
Given that, it is not a copyright violation for a third party (them) to provide a service to help the owner of the copy to make those fair use copies.