“So the USAF would be subsidizing the A330 production line after the A350 comes out.”
No, because the A330-200F will remain in production for at least a decade due to competition with the Boeing 767F and 777F. And once the production line moves here, the A330 will be priced the same if not cheaper than either one of Boeing’s offerings.
“In reality the commercially successful 767 (almost 1000 units built) will be subsidizing the USAF, who will get a protein airframe and not have to pay the full development cost (about $10B in current dollars).”
Same can be said for the A330MRTT/KC-30/KC-45.
As of June, Airbus isn’t too far behind with 975 A330’s ordered which isn’t bad since the 767 has been in production for almost a decade longer.
You don’t seem to understand what subsidy means, so it is really silly arguing with you about it (not surprising for an Airbus supporter)