Blockbuster Inc. (defendant) was a movie-rental company. Blockbuster customers could rent movies over the internet through Blockbuster’s streaming service, Blockbuster Online. Blockbuster entered into an agreement with Facebook, a social-media company, by which Facebook would automatically share the rental choices of Blockbuster Online customers with their Facebook friends. The Video Privacy Protection Act (VPPA), 18 U.S.C. § 2710, prohibited a video-rental company from disclosing personal information about its customers without their written consent. Cathryn Harris (plaintiff), a Blockbuster Online customer, sued Blockbuster for violating the VPPA. Prior to using Blockbuster Online’s services, customers were required to check a box indicating that they understood Blockbuster Online’s terms and conditions. These terms and conditions included a dispute-resolution clause stating that all claims would be referred to arbitration. Additionally, Blockbuster could modify the terms and conditions at its sole discretion and at any time, without notice, and effective immediately. Blockbuster moved to enforce this arbitration clause against Harris. Harris argued that Blockbuster’s arbitration clause was unenforceable because it was illusory and unconscionable.