”Facebook “secretly signed Whitelist and Data sharing agreements” with Netflix, along with “dozens” of other third-party app developers…
…to access, among other things, Facebook users' “messaging app and non-app friends.
…allowed Netflix programmatic access to Facebook’s users' private message inboxes, in exchange for which Netflix would “provide to FB a written report every two weeks that shows daily counts of recommendation sends and recipient clicks by interface, initiation surface, and/or implementation variant (e.g., Facebook vs. non-Facebook recommendation recipients).”