I guess somewhere in the future 'to offer a better deal to our bronze members' there will be the possibility of a bronze card holder being able to pay for access to the GC lounges to overcrowd them a bit more than they are already. It will be limited to those traveling on BA and BA lounges only but in the interests of making more and more and more money it will come. A few might even buy it but maybe not twice.
Perhaps at the same time silvers will be offered the opportunity to pay to use the first wing and F lounge. There's no end to the money making possibilities.