Microsoft's Career Network LinkedIn Abused Email from 18 Million Non-Members to Send Facebook Ads. This is evidenced by a report from the Irish Data Protection Commission.
LinkedIn: Algorithms also handles data from non-members
A second study also analyzed whether LinkedIn generally meets enough non-member data. The result shows that the Microsoft subsidiary uses the same algorithms to calculate contact suggestions for non-members as for LinkedIn users. Meanwhile, this abusive data processing has also been stopped and the records collected prior to May 2018 were destroyed.
However, LinkedIn does not need to fear serious consequences due to data protection violations, as both events occurred before DSGVO entered into force. A statement to Techcrunch apologizes for LinkedIn for data overlap and confirms that measures have been taken to avoid such incidents in the future.