I'm pretty sure when most people hear "open specification," they'll think it means "open for anyone to read and implement The shouldn't, thats not what it mean

I'm pretty sure when most people hear "open specification," they'll think it means "open for anyone to read and implement The shouldn't, thats not what it means. An open specification means that anyone can contribute to the authoring of the specification it has no bearing on licensing terms. Which is the OP's point "open" means a lot of different things.