... cited domain overall . But that growth masks a deeper structural shift. The September 2025 collapse was a warning. Reddit's citation rate in ChatGPT responses collapsed from 15% to below 2% on September 10, 2025, when Google removed the num=100 parameter from its search API . ChatGPT was bulk-pulling Google search results; Reddit dominated those results; when bulk retrieval disappeared, Reddit's citations vanished. Today's shift is different. The May 2026 Core Update and June 2026 Spam Update ...