That's the hard part & the most tricky as well. As when the product you are making is so simple to make, then marketing is the only differentiation. On a related note, read this blog post → https://www.allencheng.com/starting-a-business-around-gpt-3-...

You need to make something that hasn't been done before so you'll have interest from people as GPT-3 is hyped up now. Spend less than the users will pay you. At first, you need to concentrate on getting customers. Most people use AppSumo lifetime deals but I think they're only good for funding your startup initially without VC money.

Otherwise you can go the VC route & get funded if your idea has legs.

Distribution/marketing is the hardest part in GPT-3 based biz but if you do it right, you'll print millions for sure.