How do you create a $15 billion company in an industry that gives its primary product away? Line did it by getting smartphone users to pay for (...)

The Facebook effect: rival messenger app Telegram claims a surge of popularity in the wake of Facebook’s deal to buy WhatsApp. Photograph: Dado Ruvic/Reuters

After Facebook announced last week that it would buying WhatsApp for $19 billion, a competing messaging application backed by Pavel Durov, crea(...)

Facebook is paying more than double its annual revenue for a chat program that has little revenue.Photograph: Chris Ratcliffe/Bloomberg

Facebook’s purchase of fast-growing messaging startup WhatsApp for an eye-popping $19 billion largely won approval from analysts, who said the (...)