Mike Gupta, chief financial officer of Twitter Inc., left, and Richard 'Dick' Costolo, chief executive officer of Twitter Inc., exit JPMorgan Chase & Co. headquarters in New York, U.S., on Friday, Oct. 25, 2013. Twitter Inc. will make the case to potential investors in its initial public offering that it needs to keep spending to grow, and profit will come once it can reap the benefits of those investments. Photographer: Scott Eells/Bloomberg via Getty Images