A new crop of social networks launched since 2008 focus on messaging, either sending of text or photos. Snapchat (2009) lets users send photos to friends that self- extinguish in ten seconds. Slingshot (2014) lets Facebook users instant message photos and video to their Facebook friends. พhatsApp (2009; acquired by Facebook in 2014) is a messaging service that, for $1, lets users send text, photos, and videos to their friends’ cellphones using the Internet and without having to pay telecommunications companies for use of cellphone SMS messaging services. It is unclear if these social networks based on messaging are economically viable.