https://www.theregister.co.uk/2018/06/05/facebook_device_data/

Facebook on Sunday said an arrangement that gave some 60 mobile device makers access to data about device users' Facebook friends is not at all like the deal it made with app developers that gave rise to the Cambridge Analytica scandal.

Developers who signed up for access to the Facebook Graph API used to be able to get data on the friends of people using apps that integrated the API, provided those users had authenticated themselves via login.