I found out that there is a major bug/feature in the game.
When I was flying one time, I found a fuel canister and flew left of it, accidentally missing it.
Found out that there was another canister to the left, so I flew towards it.
Then there was another! And another and another and another until I REALIZED that they were duplicates of the first one. Did the same thing with the money bags. Got a butt-ton of money.