Regulatory action prompts Visa to back off a fintech acquisition, Uber and Moderna partner and Checkout.com is valued at $15 billion. This is your Daily Crunch for January 12, 2021. The big story: Visa calls off Plaid acquisition The deal, valued at $5.3 billion, was first announced just over a year ago. However, the Department of Justice filed suit to block the acquisition in November, arguing that it would “eliminate a nascent competitive threat.” In today’s announcement, Visa said it could still have made things work, but the threat of…