Okay, the two answers I got, one from two different people, contradict each other.
If space is expanding, the space that was 1 cubic meter then becomes 8. Those ~5GeV now become ~40GeV. So, why is that energy not what is moving the objects? That energy just came out of nowhere.
Or, is that...
Since space is expanding, and that expansion moves things, then those moved things must be moved by something. If moved by space itself, then space must be providing the energy. And if gravity is a function of space and time interacting, then what is the energy or mass of a volume of space...