> I find myself holding back private research because I don't want to provide free R&D for a value-extraction machine that is already efficient enough.

If someone wants to release technology in a way that makes it publicly viewable but restricts its use, they can do that.

If they don't want to release it, they don't have to.

Additionally, publicly released technology destroys patentability, if that's the objective.

I don't understand what one would want to achieve that can't be achieved here.