Over the past year, Business Insider reports that stories started piling up in online communities of credit-card super users suddenly having their accounts shut down by JPMorgan Chase. The company is one of the country's largest card issuers.<br />It opened up fervent analysis among the growing community of credit-card enthusiasts over the calculus used by card companies to sever ties with customers.<br />A seemingly similar story surfaced in the Facebook group "Chase Sapphire Reserve Cardholders. <br />
