Viewed as the worst gaming community breach of all time, in April of 2011 Sony Playstation Network (SPN) user reported fraud against their credit cards. A security firm reported that hackers were offering SPN users credit card details for sale. this shut down SPN for a month and estimated losses of SPN at $171 million. In 2014 Sony agreed to pay a $15 million settlement in a class action lawsuit.

https://www.csoonline.com/article/2130877/data-breach/the-16-biggest-data-breaches-of-the-21st-century.html
https://www.csoonline.com/article/2128427/network-security/playstation-network-users-reporting-credit-card-fraud.html