The publishers usually can't publish their games' source code, because of various library and middleware dependencies which are not free or open-source. Same i

The publishers usually can't publish their games' source code, because of various library and middleware dependencies which are not free or open-source. Same issue with cheap IoT gizmos. Even if the retailers wanted to publish an implementation of their backend servers, they probably bought (rented) much of the functionality from a third party, under a license which forbids redistribution of the third party's IP.