I have no way connection with this product or their makers.
But do every product has to be different from every other product? Is it a criteria for success ? or, you are making a statement that if someone else builds it, another person should not build the same ?
I think the intent of the question was not to discourage people from doing something that has been done. That's how we all learn. The question is what makes this different than the 5 other OpenAI API frontends released in the past 3 days alone, for free, that you feel like it is worth charging for? Since the LLM is doing the heavy lifting, the stack used to build this can run on a lemon. Python and Node are just the glue needed to do it with little effort in less than a week.
But do every product has to be different from every other product? Is it a criteria for success ? or, you are making a statement that if someone else builds it, another person should not build the same ?