Numbers from the public record on advertising and recommendation inside AI assistants — with sources linked and biases labeled.
What ChatGPT ads cost in August 2026: CPC, CPM, minimum spend, and the two public practitioner receipts — every figure linked, self-reported numbers labeled.
How ChatGPT, Perplexity, and Google AI Mode choose which products to recommend — the retrieval mechanics, the manipulation tactics and why they decay, and what honestly works.