Facebook has become more aggressively public about its intention to monetise its service. That emphasis is encouraging to investors, analysts said. Mark Harding, an analyst at JMP Securities, has an "outperform" rating on Facebook stock. He noted the company has become "more vocal" about its efforts to grow revenue: "People are starting to recognise that there is underlying value of the user base," he said. Facebook has recently been touting a report from ComScore that said ad campaigns on the social media site boosted purchases among fans of many brands such as Starbucks and Target. Wieser noted Facebook will now allow advertisers to bid on ad space in real-time, which could drive up prices. At the time of the IPO, Wieser had a "sell" rating on Facebook but recently switched to "hold." His target price for the stock is $US30. "These initiatives suggest they are doing things to generate revenue, and that's not necessarily a given with Facebook," Wieser said.