28.4M accounts from Mindjolt (mindjolt.com) were exposed in this breach. Besides email addresses, it included dates of birth and names.
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Dates of birthEmail addressesNames
In March 2019, the online gaming website MindJolt suffered a data breach that exposed 28M unique email addresses. Also impacted were names and dates of birth, but no passwords.
Source: Have I Been Pwned (CC BY 4.0)