Stashed in: Facebook!, Social Media, LIKE, Facebook statuses
The tl,dr effect. Bring in the memes.
I'm sure images get more likes and comments, too.
Social network demographics in 2012 - Media Report
Facebook Working on Incorporating the Hashtag
Instagram and self-esteem: Why the photo-sharing network is even more depressing than Facebook.
How Facebook Makes Us Unhappy : The New Yorker