The most expensive influencer marketing mistakes in 2026 are not creative ones. Brands pick creators by follower count and pay for audiences that do not exist, treat disclosure as paperwork while ASCI reports that 97% of influencer ads it reviewed in FY26 broke the rules, over-script briefs until the content stops feeling human, run disconnected one-off campaigns instead of building a roster, and measure with last-click attribution that structurally undervalues the channel. A