Reddit battles surge of AI-driven promotional spam
As AI search engines increasingly cite Reddit, marketers are flooding the platform with stealth promotional spam, forcing volunteer moderators and Reddit's own AI tools to fight back.
According to data from Semrush, Reddit became the most-cited domain in May by major AI systems, including ChatGPT, Perplexity, Google's Gemini, and AI Mode. This surge in citations has triggered a wave of covert marketing campaigns on the platform. Marketers are attempting generative engine optimization to get their brands mentioned on Reddit so that large language models will recommend them. For instance, a user on r/SkincareAddiction, a community with over 1 million weekly visitors, flagged a suspicious account promoting a Honeydew Labs spray with 0.02% hypochlorous acid. Similar astroturfing has hit r/CleaningTips, r/BuyItForLife, r/FoodNYC, r/salestechniques, r/loseit, and r/indieheads, where moderators recently investigated promotional activity tied to the band Geese.
To combat this, Reddit is leveraging its own AI and machine learning tools. In its 21 years of existence, the platform has had to constantly adapt to evolving spam tactics. Reddit reports that its automated systems currently catch 25,000 spammy posts and comments while blocking 23 million spam views daily. This defense is crucial because roughly 40 percent of all discussions on Reddit are commercial in nature, making the site highly lucrative for stealth advertising. Reports from outlets like 404 Media have also highlighted similar spam onslaughts targeting biohacking subreddits with peptide promotions.
For AI and marketing practitioners, this shift marks the transition from traditional search engine optimization to answer engine optimization. Because AI chatbots do not always require direct backlinks to cite a source, merely generating organic-looking brand mentions is now a primary goal. However, practitioners must realize that deceptive tactics are increasingly ineffective. Reddit's volunteer moderators are compiling brand blacklists, and as one moderator noted, marketers fail because "they’ve got an agenda" that normal posters do not. Instead of utilizing deceptive bots, companies must learn to engage honestly on these platforms, as artificial hype is quickly filtered out by both human moderators and platform-wide AI detection systems.
This is our own summary of reporting by The Verge AI
