Left-wing political campaigns pay three times as much to reach right-wing voters on Facebook, and vice versa, which may be exacerbating political polarisation
Source:
https://www.newscientist.com/article/2227041-facebook-charges-more-for-ads-that-aim-to-cross-the-political-divide/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home