Three signals, in order of reliability. First, audience geography breakdown from Instagram Insights or YouTube Studio shared directly by the creator — fake audiences skew heavily to Tier-3 cities or show country patterns that don't match the content language. Second, engagement quality — read the top 20 comments on the last 10 posts; authentic audiences ask questions, fake audiences post emoji and generic praise. Third, growth curve — a creator who added 300,000 followers in one month without a viral event is a warning sign. Our 12-point vetting includes all three; paid third-party tools (HypeAuditor, Modash) provide a signal but are not a substitute.
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