Inside the DemandScience by Pure Incubation Data Breach

Troy Hunt analyzes a large corpus of ~122 million unique email addresses and related business metadata from a DemandScience / Pure Incubation leak discovered on a hacking forum; the dataset appears to be an aggregation of publicly available sources, originates from a decommissioned system, and contains no confirmed usable password hashes, though it raises privacy and phishing/spam risks and has been added to Have I Been Pwned for notification.