They haven't put ads in ChatGPT yet as far as I know. It doesn't really make sense to work off the raw revenue before they put the main revenue-raiser in. Search isn't a very impressive money maker either if we take AdWords out.
You and everyone else seem to assume on faith that OpenAI's ads revenue is going to dwarf their subscription revenue -- but you're being suckered. If you do the math, you'll find it's not nearly as clear-cut as you think.