Gamma's UGC pages become parasite SEO target, risking domain-wide Google penalties
gefei55 · x · 2026-11-12
- What happened: Gamma lets its /docs/ UGC pages be crawled for organic search traffic, and black-hat SEO operators have exploited the mechanism, mass-generating NSFW, gambling and scam pages on Gamma's high-authority domain (parasite SEO).
- The risk: Without content moderation, Google may deindex those pages—and possibly penalize the whole domain.
- The lesson: Sites leaning on UGC for organic traffic need quality/spam valves. The quoted post cites Ameblo's @kimuyan, who shared a similar filter system (controlling which UGC pages get indexed) at Google Search Central Live—Ameblo had deployed it years earlier.
Related event: Gamma's Open UGC Pages Hijacked by Black-Hat SEO Spammers(4 posts)→
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