SeekingAlpha reports on the valuation of Square, Inc. citing several factors that have led to an overvalued stock price of $17.37; the author reports that assumptions on the growth of its customers is overestimated; says it will have difficulty when expanding to higher value customers and internationally also reporting that the business model is at risk to lower cost market competitors; also says that its reliance on Square Capital lending to retain customers and balance attrition of gross payment volume is unlikely primarily due to market competition.  Source