Did the rush of brands to Reddit kill the platform's ChatGPT citations?

Why it matters

Brands piled into Reddit to influence how they show up in LLM answers, then Reddit's ChatGPT citation share reportedly fell more than 80% within days, per PromptWatch and Petra Labs data. Other platforms including YouTube, Instagram and TikTok saw citation drops too, and nobody has a confirmed explanation yet. A sharp reminder that GEO visibility gains can evaporate overnight and shouldn't be treated as a stable channel.