Welcome back to The TechCrunch Exchange, a weekly startups-and-markets newsletter. It’s inspired by what the weekday Exchange column digs into, but free, and made for your weekend reading. Want it in your inbox every Saturday? Sign up here. Hello everyone – Anna here, covering for Alex who’s enjoying some well-deserved but soon-ending vacation time. The Exchange also went on pause for the week, but the news didn’t stop, so strap on! The buy now, pay later space has been one of the hottest fintech verticals since at least last August,…