I think "thank you" are used for inference in follow-up messages, but not necessarily timestamps.
I just asked ChatGPT this:
> Suppose ChatGPT does not currently store the timestamp of each message in conversations internally at all. Based on public numbers/estimates, calculate how much money it will cost OpenAI per year to display the timestamp information in every message, considering storage/bandwidth etc
The answer it gave was $40K-$50K. I am too dumb and inexperienced to go through everything and verify if it makes sense, but anyone who knows better is welcome to fact check this.
I just asked ChatGPT this:
> Suppose ChatGPT does not currently store the timestamp of each message in conversations internally at all. Based on public numbers/estimates, calculate how much money it will cost OpenAI per year to display the timestamp information in every message, considering storage/bandwidth etc
The answer it gave was $40K-$50K. I am too dumb and inexperienced to go through everything and verify if it makes sense, but anyone who knows better is welcome to fact check this.