American Express continues to churn out nice deals for a variety of retailers when you “sync” your card with social networks, while Discover enhanced a couple of its existing benefits. Read on for the details.

American Express / Foursquare Deals

• Spend $10, get $5 back at more than 100,000 local businesses after you sync your Amex card with Foursquare
• Get $5 after spending at least $24 during NYC Restaurant Week at participating restaurants after syncing your Amex with Foursquare

American Express / Twitter Deals
Note: Many of these deals should also be available if you use Amex’s Link, Like, Love app on Facebook.

For details on how to sync your card with Twitter, see this post.

Merchant	Discount	Hashtag	Dates Valid
Amici’s Pizzeria	Get 20% back after spending $25+	#AmexAmicis	8/1-10/30/12
Best Buy	Spend $200, get $20 back	#AmexBestBuy20	7/26-9/16/12
Lucky Strike	Spend $50, get $10 back	#AmexLuckyStrike	7/30-9/30/12
Macaroni Grill	Spend $50, get $15 back	#AmexMacGrill15	8/1-9/3/12
Rent the Runway	Get $25 on next $125+ order	#AmexRTR	8/1-11/1/12
Simon Malls	Purchase a $50 Simon gift card, get $10 credit. See list of participating malls here	#AmexMacerichMalls, #AmexSimonMalls, #AmexPREITMalls, #AmexOutlets	8/1-9/3/12
skybar	Spend $100, get 25% back	#AmexSkybar	5/18-8/14/12
Travelocity Hotels	Spend $250 on hotel purchase, get $50 back	#AmexTravelocity	7/15-8/31/12
Wolfgang Puck	Spend $100 at Wolfgang Puck Bar & Grill LA, get $20 back	#AmexWolfgangLA	6/20-10/15/12

Discover Deals

• Improved buyer protection benefits – Discover recently improved its extended product warranty and purchase protection coverage by offering it automatically to all consumers when they shop using their Discover card. The extended product warranty benefit doubles the warranty length of an item, up to an additional 12 months. It does not, however, apply to warranties that already are at least 3 years. The purchase protection benefit reimburses customers up to $500 for a damaged or stolen item that was purchased within the last 90 days, with exceptions.
• 2% cash back in London with no forex fees – Through 8/31/12, get a 2% cashback bonus on every purchase in London when you use your Discover card.
• Free 1-day shipping on back to school items on Amazon – Valid through 9/15/12 or while promotional funds last, purchase certain back to school items with your Discover card and get free 1-day shipping with code DSCVRFSP. Continental US only.