Barely a week goes by without Facebook facing one crisis or another, according to the media — usually relating to the fact that US teenagers are using other services more regularly. Most recently, boffins at Princeton used data to suggest 80 percent of users will leave Facebook by 2017. Facebook then humorously debunked that by using the same methodology to ‘prove’ Princeton’s enrolment would halve by 2018, and that the world’s air supply will disappear by 2060. Despite claims of a decline in the West, Facebook is stronger than ever in the rest of the worldJokes aside, it is true that Facebook does face concerns. Snapchat is estimated to have 50 million registered users – with some suggesting usage of the ephemeral chat app has tripled among teens over the past year. Likewise, messaging app Kik is quietly cruising.