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ANother offer, which doesn't seem to part of the sync, is here:
http://www.wholefoodsmarket.com/gift-cards/american-express-reload
Basically buy a reloadable Whole Foods card, set it up for auto-reload with any Amex, get $10 for first load of $100, and then $5 every third $100 reload. Not huge, but good if you shop there. Now just need to make sure that the reload counts as a grocery purchase.
Thanks! Perfect timing, since I've got a few weeks off!
Good find, thanks