I earned 500 miles off coupon after hitting 4 of the cloud surprise icons. More specifically, I won the 500 miles after hitting the star shaped cloud and stopped playing and registered at that point. The miles will post “within 7-10 business days.”
Of course the 500 miles will also extend the life of your entire account for another 18 months.
I had already played this game back in July and earned a 10% off AA flight coupon but now the prize seems to be 500 miles. I had no problem claiming them even though I had previously received the 10% coupon.