Really good financial model
While the rates are low borrow like hell, create an environment to tie the punters in, stifle the competition and produce a global near-monopoly.
Rope the punters some more, make sure the shackles are really tight.
Then, oops, financials aren't so good, our profits aren't as high as we expected, pay us double for our product which you totally rely on or lose it at the end of the month ... please.