So American Express has setup their own PayPal like system called "Serve."
Signing up here will net you a free $10 just for signing up.
Then answering a trivia question here and answer a trivia challenge for another $10.
ProTip: You only have 15 seconds to answer the trivia question so if you're stumped, then just click the "Activate Help Line" feature and google for the answer.
You're welcome for your free bucks!
As usual, be sure to check spam folders if you aren't getting the email.