At the moment, Facebook has no way of showing when political posts come from paid activists, and the CNBC source has not shared any solutions.
"We believe it is important that political campaigns have the guidance and tools to be transparent," a Facebook spokesman told CNBC. "For this reason, we recommend campaign employees to make the relationship on their accounts clear. We welcome clearer guidance from regulators in this area."
According to Facebook's ad library, Bloomberg has spent $ 48.5 million on campaigns and ads since last May. Its latest strategy is a relatively unknown area.
"We meet voters everywhere on every platform where they post their news One of the most effective ways to reach voters is by activating their friends and network to encourage them to support Mike as president. " "Bloomberg's high-level national spokeswoman for the Bloomberg campaign, Sabrina Singh, said in a statement to CNBC.
In recent years, Facebook has taken steps to create transparency about political advertisements. It has started paying political contributions tag and archive in its ad library, but the company has also been criticized for allowing politicians to place untrue ads.
Last week, Facebook told Instagram influencers that they had to disclose paid partnerships with political campaigns unclear whether similar information is required for the campaign staff or how such rules are enforced.