ClixSense, a site which pays users to view ads and take surveys, was the victim of a massive data breach compromising around 6.6 million user accounts.

Usually when there’s a data breach of this size, the information stolen contains usernames, passwords, and some other personal information, but due to the nature of ClixSense and the service it provided, home addresses, payment histories, and other banking details have also been compromised.

Source: Reset those passwords — again: Over 6 million ClixSense users compromised by data breach