More alarm bells are raised about the quality of Facebook's (FB -1.8%) ads by BTIG's Richard...

|About: Facebook (FB)|By:, SA News Editor
More alarm bells are raised about the quality of Facebook's (FB -1.8%) ads by BTIG's Richard Greenfield, who is reiterating a Sell and $22 PT. Greenfield sees the arrival of "dark posts" - news feed ads that don't tie back to a marketer's Facebook page - as more evidence the company is desperate to prop up near-term ad sales even if doing so hurts the user experience. "We expect Dark Posts to bring out the worst in brands and advertisers, as they do not have to live with the consequences of their ad campaign." Last week, Greenfield argued Facebook's mobile ad quality is declining.