To help juice revenue on its Facebook Gifts marketplace, the social network is testing dramatic discounts to select customers. For example, CNET reports one promotion that offers $4 off a purchase of $5 or more. As Jennifer Van Grove notes, “Desperate though the ploy may be, it could work. Facebook’s store includes a few $5 gift items, which means members can use the offer to send a decent gift, say a $5 gift card to Starbucks, for just a buck. In the process, Facebook gets to keep the member’s credit card information on hand, and ideally will be able to convert the one-time buyer into a more regular customer.” [Source: CNET]