Pricing is a tricky one for chatbot answers using chatGPT or another LLM. I see companies saying Unlimited Questions but there must be a 'fair usage clause' in their T&Cs as even #OpenAI cant give you unlimited questions and answers.

There is much to say on Product Market Fit and its extremely hard to do. I have been trying for 5 years going on 6 but what I do is, when you get it, you know as everything else takes off around you! I think Noah Kagan explains it best here: https://www.youtube.com/watch?v=wBEA6Wrx94g&t=649s Basically if you can sell the idea and get cash for it without the product then theres a good chance you have product market fit - not guaranteed though.