Facebook has a plan to squeeze more ad dollars out of ecommerce sites and anyone else selling products on the web. It's quietly testing a new version of its Offers coupons that can be redeemed at online stores, not just at physical shops. Sources clued us in and Facebook has now confirmed with me that users will see Offers in the news feed, ads, and Sponsored Stories that feature a promo code or special link to click through for a discount on off-site purchases.Similar to how the existing version of Offers lead to foot traffic and revenue for brick-and-mortar stores, big brands with web stores, ecommerce hubs, and celebrities with merch to sell could soon use Offers to drive sales. Coupons like "Take $5 Off A Purchase Of $50 Or More" can produce real return on investment. So while they're free to run, businesses will pay Facebook to show their Offers to more people. read more..