Detection
Reviewer Bot / Ad-Review Crawler
A reviewer bot (or ad-review crawler) is an ad platform's own automated system that fetches a campaign's landing page to check it against advertising policy before, and sometimes well after, approval — Google's AdsBot and Googlebot, Meta's facebookexternalhit, TikTok's review infrastructure, and equivalents at Microsoft/Bing and other platforms. Cloaking X attributes each platform's reviewer by its published IP ranges and network origin (ASN) and routes it to the stream's fallback page, while a real click reaches the money page.