@DrMumMum - I had a facebook pop up today asking if I thought Facebook values it's users.
They had one of those Strongly Agree / Agree / Neither Agree Nor Disagree / Disagree / Strongly Disagree choices and a box to add a further comment.
I said I disagreed that Facebook cares about it's users and cited two reasons.
The first was that I reported an image of a woman being pushed downstairs by a man, with the caption "next time don't get pregnant bitch' on it. Facebook had replied to say that did not violate their terms in any way as it was humorous. Nine months later they finally contacted me to say they had changed their mind and removed it.
The second was that they censored WPUK as malicious for wanting to discuss women's issues without being attacked, which I feel is wrong. So I said I do not believe that Facebook cares about it's female users.
I don't know if you can just find that survey but if you do come across it I would tell them what you think and why.