AI audience simulation tools promise to predict what consumers might think, but performance marketers have long had access to a more reliable source of audience intelligence: competitor ad creatives that have already survived real market testing. Every scaled ad encodes valuable information about audience psychology, pricing sensitivity, objections, emotional triggers, and buyer behavior. While AI twins have their place in exploring entirely new markets or concepts, spend-validated creative intelligence remains one of the most actionable and trustworthy forms of audience research available.