GPS, considering the uses worldwide, IMHO it is probably the biggest free giveaway by one country in the history of mankind.
The US should have set up a subscription licensing program. An A380? $1 million/year should cover it and go down from there based on weight. Drilling a deep water oil well and need a ship to hold station within 1 meter? $5 million flat fee should cover it. Reduced accuracy for pure safety and survival needs should be free.
Then again, the GPS services market from the EU and RU would probably get competitive quickly.