American Express has upgraded its Sync program to work with Twitter, so that Cardholders can now purchase items by using a hashtag. The first item for sale will be a $25 American Express gift card which can be had for $15 if you tweet #BuyAmexGiftCard25. Other initial offers will include a Kindle Fire, an Xbox controller, an Xbox 360, and an Xbox Live subscription. If the consumer chooses to buy the item via hashtag, @AmexSync will reply with a confirmation hashtag to confirm the purchase. If the user confirms, the item will be shipped, for free, to their home within two days. Amex isn’t the first company to sync purchasing with Twitter, however, as in 2012 a startup named Chirpify linked with PayPal to allow users to buy and sell on twitter using handles. But Amex’s expansion represents the largest move into “T-Commerce” yet, and every hashtag yields more promotion and brand endorsement over social media.