Whole Foods is offering a free $5 promo gift card for each gift card you buy online.
The minimum gift card order is $20, but you can repeat the purchase multiple times. After each purchase you will receive an email with your $5 promo card that can be loaded to your Google Wallet account. The promo card credit must be used by January 31, 2015. Unfortunately, reloading an existing gift card does not seem to trigger this promotion.
Whole Foods is also continuing to offer a $10 bonus on each auto-reload of your gift card when you use an American Express card through December 31 2014. Details here.
Hat tip to The Deal Mommy for finding and testing this deal!