As I wrote about yesterday, American Express is running all sorts of coupons//savings with Twitter. Most require that you spend a certain amount and then you get a credit applied automatically to your Amex statement.However, one of the newest is $10 off a $10 purchase at Best Buy. So basically, you can get $10 in free stuff, which is pretty sweet for spending a minute to sign up and 5 seconds to Tweet. Not bad since it’s free to sign up and they confirm your registration via Tweet with a link to the T&C. Seems pretty straight forward.Quantities are limited so to get in on this deal:1) Sync your Amex card and Twitter account here. (If you need one, you can create a Twitter account here)2) Then send a Tweet with #AmexBestBuy103) They will confirm in a Tweet back with a link to the T&C4) Make sure you follow me @Thepointsguy! (Okay, that may not be necessary for this promo, but you should anyway!)Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Hat tip TPG Twitter follower @Bitachu![card card-name=‘The Platinum Card® from American Express’ card-id=‘22504813’ type=‘javascript’ bullet-id=‘1’]