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Together, they came up with Square, a mobile credit card payment method that allows vendors to accept payments anywhere with a smartphone, skipped the merchant account process, and offered lower processing fees.
Fortunately, he was a friend of Jack Dorsey, the founder of Twitter, who knew a few things about thinking big.
In 2009, an artisan glassblower named Jim McKelvey lost a big sale because his buyer could only pay with a credit card.
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