I'll give you 10k usd if you copy this work in 1 hour (which is much easier than creating it, mind you). Otherwise stop downplaying other's people work.
OK, do I understand correctly you are offering 10000 USD for someone who recreates this service (=a website that generates an Excel formula based on its description in English) in a week?
Frankly, and I don't want to downplay anybody's work, but this seems doable. The core engine based on API calls to OpenAI is probably a few hours. The remaining time is for user authentication, subscriptions, payments, graphics and so on.
I know this because I'm using OpenAI API for personal automation projects and in spite of its quirks it's relatively simple especially if you don't need continuity and each task is independent.
No, that was a joke. But only a few very capable people can do something at the same level as GPT Excel in one week. Including videos, templates, etc. A prototype? Yes. it will be bad. If you wanna bet, I'm all in.