Reddit’s citations in ChatGPT Search plummeted by 86%, dropping from 3.8% to 0.5% of all citations in roughly one week. The decline began around August 8, according to data tracked by PromptWatch. The cause appears to be a modification to ChatGPT’s query fanout behavior by OpenAI, which altered how the AI expands user queries and ranks sources. This drop is not observed in the same way on Google AI Overviews and AI Mode, suggesting a change specific to OpenAI’s systems rather than a broad devaluation of Reddit as a source. Investors should watch how Reddit’s management addresses this situation in upcoming communications.
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