KEY POINTS
  • Ads from politicians and campaigns accounted for at least 3% of Facebook's estimated third-quarter U.S. revenue, according to data from Facebook's ad library and the Center for Responsive Politics.
  • Google has dramatically limited targeting for political ads and Twitter banned them altogether, leaving Facebook as the only game in town for many campaigns.
  • "For better or worse — mostly worse — Facebook is the de facto place you go," said Nick Fitz, CEO of online donations site Momentum, which powers the Defeat by Tweet campaign.

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Former Vice President Joe Biden, presumptive Democratic presidential nominee, wears a protective mask during a NowThis economic address seen on a smartphone in Arlington, Virginia, U.S., on Friday, May 8, 2020.

Anti-Trump super PAC Defeat by Tweet launched in June and has run up an advertising bill of more than $800,000 with an online campaign that encourages people to automatically donate money every time the president tweets.

Thanks to Trump's habitual tweeting, the group has parlayed its spending into about $3 million of fundraising. However, none of that ad spending has been on Twitter. Instead, it's taking place exclusively on rival social media site Facebook.

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