Most Community Notes on X Never Publish, Yet Those That Do Curtail Viral Spread

Roughly 85–90% of Community Notes—fact-check labels proposed by X users—fail to reach the consensus threshold needed for publication. A September 2025 University of Washington study confirmed that notes clearing that bar measurably suppress a post's engagement and reach. The real constraint on X's fact-checking impact is publication volume, not the effectiveness of notes themselves.