My apologies. The “break even” calculation in the first paragraph seemed so absurd to me (as much as the $2K per month) that I must have skipped over the second paragraph. Nevertheless, with regard to the second paragraph, to fill the $5B gap it would take over $30 on top (hence $50), which would be quite a high price for many users.
That’s users, not subscribers. Apparently they have around 10 million ChatGPT Plus subscribers plus 1 million business-tier users: https://www.theinformation.com/articles/openai-coo-says-chat...
To break even, that means that ChatGPT Plus would have to cost around $50 per month, if not more because less people will be willing to pay that.