ChatGPT advertising returns 6.6 times worse than Google search advertising. For every $1 spent on OpenAI's chatbot, companies generate $0.52 in revenue compared to Google's $3.40. The conversion rate on ChatGPT was 0.37% compared to 1.17% on the search engine. Among 102 neural network advertisers, 82% did not record a single purchase through paid placement, while free recommendations from the chatbot itself show the best results. Bank of Russia.