Antitrust investigators are looking into the financial incentives that Visa gave Square, Stripe and PayPal, the people said. Investigators want to know if those deals kept the payments firms from using other card networks or money-movement technologies.
The DOJ’s antitrust investigation is also examining whether Visa unfairly limited merchants from routing debit-card transactions over other rails, the Journal previously reported. “We believe Visa’s U.S. debit practices are in compliance with applicable laws,” the company said at the time.