Those numbers sound... unrealistic to me. Just doing some napkin math: 65 $/user/month / 0.01 $/ad ~= 6500 ads/user/month, which is about an ad per minute if you assume someone is using the chat interface 4 hours a day including weekends. Maybe you see that behavior from "my GF/BF is AI" types but I'm also already assuming 0.01 $/ad which is super high to my understanding (if you work in adtech please correct me if I'm wrong). I don't forsee over 50% of your workday or leisure time spent in ChatGPT as likely, especially if the ad rate is well beyond YouTube's nigh-unusable amount it is now.

There's never going to be 65$/user/month, they already struggle to move past 5% of paying users with the current pricing.