Basically this. Access owns it. Even though they aren't doing anything with it, if they just released the code they would probably open themselves up to lawsui

Basically this. Access owns it. Even though they aren't doing anything with it, if they just released the code they would probably open themselves up to lawsuits over possible 3rd party code. So they would have to pay someone to go over the code to take out 3rd party stuff. That would take money for which there is no tangible benefit to them so they won't do it.