Events having a political context generally overestimate the crowd size, often by a lot. The numbers may as well be made up out of thin air.
Political and financial motivations for inflated numbers: Event organizers, political campaigns, and venue operators often benefit from reporting higher attendance figures for marketing, fundraising, or political credibility purposes [1].
Fact Check: How accurate are crowd size estimates compared to actual…
More information here: attendancetoolkit.pdf
