Amex giving away $10 statement credit for shopping at small business in Boston/Chicago/Philadelphia

American Express is giving away a $10 statement credit for their Shop Small promotion for small businesses in Boston, Chicago, or Philadelphia.
You must register your American Express card via Facebook, Twitter, foursquare, or online at www.shopsmallnow.com [shopsmallnow.com].
Registration starts June 21st and the promotion runs from June 21st to July 4th.

Twitter: Sync their eligible Card with Twitter and tweet #AmexShopBos, #AmexShopChi, or #AmexShopPhi to add the appropriate offer to their synced Card;
Foursquare: search for stores in Boston/Chicago/Philadelphia from your smartphone Foursquare App and Click check in before you buy any thing


Links:
https://enroll.amexnetwork.com/US/en/bos/
https://enroll.amexnetwork.com/US/en/chi/
https://enroll.amexnetwork.com/US/en/phil/

OFFER TERMS:
The following Offer Terms are specific to the Offer above:
Limit one per Card across platforms; Cardmembers who have already received a Shop Small Boston statement credit through Facebook, Twitter, or foursquare are not eligible. Registration is limited. Spend $10 or more in a single purchase by 7/4/12. Offer valid in-store at qualifying small businesses in the Boston metro area. Payments using Square are not eligible for this offer. Prepaid and Corporate Cards are not eligible. Offer not valid at government agencies, charities, non-profits, trade associations, shopping property management firms, political, religious or educational organizations, and some franchise locations. Refer to the Shop Small Map and Directory for qualifying businesses. Statement credits are generally issued within 3-5 business days after your qualifying purchase, but may take up to 2 billing periods to post to your account. If your registered Card is replaced during the promotional period, please call the customer service number on the back of your Card for assistance.