You know why I think they are doing this? Because there have been studies showing that people are miserable on facebook (see below) and I think people are start

You know why I think they are doing this? Because there have been studies showing that people are miserable on facebook (see below) and I think people are starting to pick up on it. So FB feels some pressure to lighten the mood a bit. But as usual they do it with the subtlety of a drunken fool. Also, the comparison to an A/B test is a false one. This is specifically to alter the moods of the user and test the results in a study, not to improve the users experience or determine which app version works better. Regarding the study mentioned above: http://www.newyorker.com/online/blogs/elements/2013/09/the-real-reason-facebook-makes-us-unhappy.html http://www.newyorker.com/online/blogs/elements/2013/09/the-r...