Following a security intrusion, the PlayStation Network had a temporary suspension of operation which began on April 20, 2011 and affected 77 million registered accounts.[7] Lasting 23 days, this outage was the longest amount of time the PSN had been offline since its inception in 2006.[8] Sony reported that user data had been obtained during the intrusion.[9] In June 2011, Sony launched a "Welcome Back" program following the outage, allowing all PSN subscribers who joined prior to 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.[10] 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.[11]