Facebook’s Offers product will no longer be free for businesses, a move that could help its revenue stream. Facebook Offers, launched earlier this year, gives retailers and merchants a chance to send deals to their fans on the social network. Soon businesses will have to pay at least $5 on ads to promote each of those offers to targeted audiences of fans and friends of fans. This reflects Facebook’s effort to respond to Wall Street’s concerns about the social network’s ability to generate bigger revenues. Facebook Offers is also undergoing two other changes: It will now be available to online-only businesses in addition to businesses with physical locations, and it will integrate barcodes. (Reuters)