It was quite a while ago.
Do you remember hearing about the whole Cambridge Analytica scandal? As I recall that was all based on a third party Facebook app that collected data from users and then used the data in ways that people didn't like, in ways that Facebook had no control over.
A long time ago there were all sorts of third party games and other social media apps that could set up shop on Facebook and interact with you right from your Facebook news feed.
Just for example, there was one that I actually liked and actually missed when it went away. It took your list of friends and friend of friends to generate a graph on a circle to show the linkages between them. It was really neat to see how the clusters of friends set up, and also the surprising connections between friends in different groups that you never would have guessed.
But yeah, a lot of the apps were just garbage quizzes.
