what is a corporation? a corporation is a specific modern legal fiction that exists to produce profit for its owners, who are distinct from the people who actually perform any of the work.
this is an *extremely limited* vocabulary of action. if something cannot be framed as producing profit, a corporation cannot do it, period. so they necessarily turn everything they touch into a profit scheme, like someone with a hammer turning everything they see into a nail.
so faced with "openness" what will a corporation do? the only thing it can do: try and turn it into a profit making scheme.
is there a way to make maximal profit while supporting an open network/community/society? theoretically? maybe? but we haven't seen anything like that yet. its a much more straightforward path to enclose the open thing, make it your own, control it and extract value from it.
to expect anything else is to fundamentally misunderstand how the world works.