[michaelt]

  As for the grandma analogy, you indeed did consent
  to your data being shared

I didn't do the quiz, though - so I didn't get the "Allow Access?" prompt [1] where I consented to share my data with the quiz company.

Is Facebook saying that consent form is irrelevant, and they're entitled to share your data with new companies without showing you that form to get your consent? If so, that seems like the kind of deliberately deceptive approach to that gets people asking for GDPR.

[1] https://jibjabbloggedyblog.files.wordpress.com/2010/06/34454...