Spam update, generative UI and Reddit's citation drop

86.4% — that is how far Reddit's share of ChatGPT Search citations fell in a matter of weeks. Between July 18 and August 7 the forum supplied 3.83% of all citations; by August 14–17 it was down to 0.52%. The first drop on August 8 lined up with a spike in background queries, while the reason for the second one is still unclear.

That is only one story of the week. On August 18 Google started the August spam update, the third of 2026. No new spam policies came with it, and the rollout will take several days: the March update finished in under 20 hours, the June one in roughly two days. Meanwhile generative UI, which has lived in AI Mode since November alongside Gemini 3, is rolling into AI Overviews globally in English. It builds a custom layout with interactive elements for each query, so two people typing the same thing can see different pages. "Again. Personalization everywhere," Gianluca Fiorelli commented. The full round-up comes from Search Engine Journal.

• The spam update started on August 18, with no new policies attached;
• Generative UI in AI Overviews assembles the interface per query;
• Sites can now embed the Preferred Sources button — selected sources appear more often in Top Stories and carry a badge in AI Overviews and AI Mode;
• More than 600,000 unique sources have been added as preferred, up from 345,000 in May.

What it means. The three numbers of the week — 86.4%, 600,000 and August 18 — point the same way: visibility increasingly depends on whether the system treats you as a trusted source. Read your rankings no earlier than a week after the rollout ends, put the Preferred Sources button on editorial and blog pages, and never build AI search visibility on a single platform: Reddit just showed how fast that can go to zero.