A year ago we broke the news that payment giant Stripe was quietly making its first move into business finance by testing a service for advancing cash to existing customers. Now, nearly 12 months on to the day, the company is finally unveiling an official product: today, starting first in the U.S., it is launching Stripe Capital, a service for advancing cash to customers that in turn gets repaid out of their future sales made through Stripe’s payment platform, with loan amounts and repayments based on the customer’s transaction activity on Stripe itself.