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An embedding can’t tell two age brackets apart
To an embedding model, "adults aged 25 to 34" and "adults aged 35 to 44" are the same audience. Across nine models the two brackets score 0.93 to 0.98 out of 1.0. The number that defines the segment barely registers....
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The Real Cost of Embeddings isn’t Compute
A real bid request is about 2,000 bytes. The audience vector that embedding-based targeting would put inside it is 16,000...

