How do you get more money at command and conquer generals

To earn money in Command and Conquer: Generals, the player can use Chinook helicopters (USA), Supply Trucks (China) or Workers (GLA) to take the supply crates, which are either in piles or on docks, to then be brought back to the Supply Centre and transferred into money.
The USA is the fastest, but most expensive resource gathering faction. Use two (2) Chinook helicopters per Supply Center.

Have two (2) Supply Trucks per Supply Center when playing as China.

The GLA is good at resource gathering if the resources are near by. Have twelve (12) Workers per Supply Stash.

Other ways to get money include:

• USA: Supply Drop Zones (you have to pick up any crates that miss the zone).
• China: Hackers (in Zero Hour, Hackers + Internet Centres).
• GLA: Black Markets and/or the Cash Bounty power (comes in three levels at Rank 3, gains the player a percentage of the destroyed unit's value).
• Capture: Oil Derricks. Capture Building + Ranger, Red Guard/Mini-Gunner or Rebel. Also, Black Lotus (or Super Lotus if playing as General Fai).