Growth of Square (Mobile Payments)

Square has been seeing some ridiculous growth in the past half-year.  This chart above was pieced together from a number of data sources.  If I were Apple, Google or one of the big credit card associations, I would look to buy them now.  They're not going to get any cheaper.

http://www.pcmag.com/article2/0,2817,2363609,00.as
http://www.technologyreview.com/featured-story/422785/the-new-money/ 
http://techcrunch.com/2011/02/22/mobile-payments-startup-square-ups-the-ante-drops-transaction-fee-for-businesses/
http://articles.businessinsider.com/2012-03-06/tech/31126293_1_jack-dorsey-twitter-cofounder-chart 
http://articles.latimes.com/2011/apr/28/business/la-fi-square-20110428; http://mashable.com/2011/04/29/square-payments/ 
http://techcrunch.com/2011/05/23/square-by-the-numbers-500k-card-readers-shipped-1-million-transactions-in-may/ 
http://articles.nydailynews.com/2011-10-10/news/30284601_1_square-charges-jack-dorsey-credit-card 
http://www.slashgear.com/square-mobile-payments-hits-1-million-merchants-milestone-13202063/ 
http://snbok.com/2012/02/square-payment-systems-has-surpassed-3-billion-annually/ 
http://allthingsd.com/20120325/turning-attention-to-the-payment-side-square-rebrands-its-card-case-as-pay-with-square/ 
http://www.digitaltransactions.net/news/story/349
http://www.bloomberg.com/news/2012-04-25/square-payment-pace-rises-25-in-niche-coveted-by-ebay.html 
  http://stiel.org/2012/06/18/2-million-merchants-use-square-to-process-6-billion-in-payments/