Facebook Censors at Random

The social network’s rules on political advertising burden nonprofits and are impossible to understand.

If you used Facebook in late November, you probably saw a stream of fundraising campaigns for charities and cultural organizations. That’s because Facebook offered up to $7 million in matching donations for nonprofits that used its platform to raise funds on Giving Tuesday. But this gesture masks the negative impact Facebook’s newly adopted advertising policies have had on nonprofit organizations that rely on social media.

In response to public scrutiny stemming from the Cambridge Analytica scandal this year, Facebook has...