April 20 to download two free PlayStation 3 titles and two free PlayStation Portable games. Users also received 30 free days of PlayStation Plus, while users who were already subscribed before the outage got 60 free days. After the disruption, Sony changed the PlayStation Network's license agreement to legally bar users from filing lawsuits and joining class action lawsuits without first trying to resolve issues with an arbitrator. In July 2012, Sony Computer Entertainment announced that they had acquired video game streaming service Gaikai for $380 million. The acquisition was later strengthened when Sony acquired the assets of Gaikai's market rival OnLive. At the Consumer Electronics Show in January 2014, Sony announced that Gaikai's technology would be used to power PlayStation Now; a new cloud-based gaming service that allows people to play PlayStation games on a variety of devices. During 2014, Sony rolled out the service in North America on PlayStation 3 and PlayStation 4 in beta form as a means for users to test performance and pricing structures. On December 25, 2014, PlayStation Network and Xbox Live suffered network disruption after a denial-of-service attack. Both services were flooded with millions of inauthentic connection requests, making it hard for genuine users to establish a connection. Functionality was restored on December 26, with some users experiencing difficulties in the days that followed. On January 1, 2015, Sony announced that users would be compensated for the downtime with a five-day extension to PlayStation Plus memberships. Formerly the gaming provision of the much broader Sony Entertainment Network, the PlayStation Network became Sony's premier entertainment service in 2015, unifying games, music, television and video. While synonymous with gaming, Sony said the PlayStation Network had evolved to become a "comprehensive digital entertainment brand". The SEN name is still used in some places. User information Signing up to the PlayStation Network is free. Two types of accounts can be created: Master accounts and Sub accounts. A master account allows full access to all settings, including parental controls. Sub accounts can subsequently be created (e.g. for children) with desired restrictions set by the master account holder. A sub account holder has the option to upgrade their account once they reach 18 years of age. Sony encourage registrants to use a unique email and strong password not associated with other online services. Online ID An Online ID is one's username on the PlayStation Network. It can range from