It was just this spring that Square had reached a grandiose $5 billion per year payment rate and cemented its position at the top of the mobile payment processing field it practically started. Any attempts to catch up just got a lot harder now that the startup has crossed the $10 billion mark, only half a year later. A fifth of that new rate came in the past two months and hints that the company isn't about to slow down anytime soon. The increase doesn't have any clear drive
