https://www.theguardian.com/technology/2020/feb/14/facebook-reverses-political-ads-rule-bloomberg-finds-loophole

Policy change involves what Facebook calls ‘branded content’, sponsored items posted by ordinary users who are typically paid by companies

Facebook decided on Friday to allow a type of paid political message that had sidestepped many of the social network’s rules governing political ads, in a reversal that highlights difficulties tech companies and regulators have in keeping up with the changing nature of paid political messages.