Sorry, but you've no right to free online (unfortunately). And to make sure we're on the same page, that's what we're arguing, right..?
I wish, and hope it's free regardless of whether your game is used or not, but there's no obligation on Sony to provide free online to anyone, and it's within their right to discriminate between owners of new games and used game buyers in this regard.
Maybe I'm missing a subtlety to the proposed system that relates to ownership rights or the like, and if I am, I'd be happy to have it pointed out.