Cambridge is a nonsense story that people who know fb ads at all laugh at. It didn't impact the election or any election in any way.
I was shocked at the Cambridge story because I thought everybody already knew that hundreds of thousands of 3rd parties had full access to that sort of data, with the only protection being Facebook had a policy that you weren't supposed to make a copy & pass it around.
I mean there are so many examples it's difficult to believe this is a genuine question. It sort of like asking in 1984 did anyone really get hurt by big brother watching?