I'll admit, when I had a facebook account I felt vulnerable when a post of mine didn't get too many likes but it was considered 'lame' to worry about it. Just a few years ago, it was considered a personality flaw to be preoccupied with likes and follower counts. Now it seems it's a primary and openly admitted pre-occupation of many users if not a whole generation, from average Joe's to celebrities.
Were there a set of key events that led to this normalization of what used to be a frowned upon behavior? Or was it merely a grinding away of cultural norms through persistent gamification mechanics?