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.
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.