Advertisers don't care and have never worried about this. It's the adtech supply chain, and the publishers who get paid that worry about the revenue and targeting.
Depends on the advertiser! Big brand who mostly wants to reach everyone in a geographic area? Targeting doesn't matter. Retailer that wants to bring someone back in to complete a purchase? Without targeting they won't buy ads at all.
manigandham|6 years ago
jefftk|6 years ago
(Disclosure: I work on ads at Google)