Readers who have been playing a strange game called Candy Crush Saga on their smartphones may be interested to know that — according to the New Yorker — has been downloaded more than half a billion times. More interesting still is the news that King Digital Entertainment, the Irish company that created it, earned almost $2B in sales, of which $567m was pure profit.

Last month, King Digital filed for a US IPO with a putative valuation of “up to $7.6 billion”.

The phrase “money from old rope” comes to mind. But it’s soooo old-fashioned.