Decision of the Court

In the case of MGM v Grokster the court unanimously decided that Grokster was liable for copyright infringement. Grokster was ordered to pay 50 million dollars.Justice Souter delivered the opinion of the Court.
"The question is under what circumstances the distributor
of a product capable of both lawful and unlawful use is
liable for acts of copyright infringement by third parties
using the product. We hold that one who distributes a
device with the object of promoting its use to infringe
copyright, as shown by clear expression or other affirmative
steps taken to foster infringement, is liable for the
resulting acts of infringement by third parties."