It's completely based on the points they get in the UEFA fantasy-game. Szczesny kept a clean-sheet so he got points for that. Only Lloris and Ederson kept clean-sheets as well, I'm not sure what the logic is deciding between the three. So basically it only awards points for goals, assist and clean-sheets (only for goalkeepers and defenders).
These leaks are fucking stupid. If dozens of people predict every conceivable outcome, it’s inevitable that someone will get it right. That doesn’t mean there was a leak, or that the draw was anything but random.