For its Pals Rewards members only, Petco
via Facebook offers a 5 Rewards Dollars Credit
via this Pals Rewards Push Facebook game
. (Click "play" to begin the game, and enter your Petco Pals Rewards number when prompted. Credits will appear within 7 days.) That's tied with our March mention as the best such offer we've seen from Petco. (You normally have to make $100 in purchases to earn 5 Reward Dollars.) Limit one credit per Rewards account.