It’s a two-Exchange Tuesday, everyone. First up, we’re talking fintech valuations. Next up, we’re digging into Atlanta. Last week’s news that PayPal intends to buy Japanese startup Paidy marked the second major acquisition of a buy now, pay later (BNPL) company this year. PayPal’s news followed an even larger deal by Square for the Australian BNPL company Afterpay. The multibillion-dollar exits provided hard market proof that what BNPL startups are building has value beyond simple operating results; major fintech platforms are willing to shell out large sums for their revenues…