Facebook and Signal battle over ads and privacy policies.
Most of the attention focused on Facebook this week has centered on the company’s oversight board and its decision to permit the platform’s ban of Donald Trump. Meanwhile, a weirder controversy about Facebook’s ads and privacy policies has been playing out between the social media giant and encrypted messaging service Signal. Signal initiated the spat on May 4 when Jun Harada, the company’s head of growth and communication, posted on the Signal blog about a set of ads that Harada said Signal had tried to run on Instagram. Instead, Facebook blocked the ads and shut down Signal’s adve...