Short answer: The user-generated-content share of AI citations moves faster than any other part of the citation mix. Goodie AI measured YouTube's share of social citations roughly doubling while Reddit's halved over late 2025, and Promptwatch recorded Reddit's ChatGPT Search share falling about 86% in mid-August 2026 — a drop its own publisher calls provisional. Treat UGC as a channel you in
What this covers
- What actually moved, and who measured it
- YouTube up, Reddit down — as a share of social citations
- August 2026: Reddit's ChatGPT Search share falls off a cliff
- Three reasons to hold this loosely
- Why the UGC share moves faster than everything else
This is a technical summary. The full guide — with the tables and worked examples — is on our site: *Reddit, YouTube and the Shifting UGC Share of AI Citations*.
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