Games aren't developed in a silo, for example XDefiant shares its engine with The Division and probably back-end services with most other Ubisoft games, so releasing its code could expose vulnerabilities to be exploited in games that are still running. They could still be forced to release a closed source server application though.
Games aren't developed in a silo, for example XDefiant shares its engine with The Division and probably back-end services with most other Ubisoft games, so releasing its code could expose vulnerabilities to be exploited in games that are still running. They could still be forced to release a closed source server application though.