 Their dive into sites found ads that promised free political merchandise but didn't mention an $80 charge that would later appear. Right-leaning ads were more likely to target men. Progressive ads were more likely to target women. Researchers also found deepfake celebrity endorsements and false claims about political topics. Stromer's research examined more than 2,200 groups on Facebook or Instagram that ran ads between September and May. The ads were seen more than one billion times. I'm Jennifer King. 17 till...