Do you know of some good examples?
Is there a list of GPT-3 based projects that I could find somewhere?
Personally, I'm working on a kind of text based renderer, for lack of a better word. It's an API where you ask it to describe things. For example, a volcano with farms, in first person:
"Lava flows down the sides of the mountain and gathers in a horseshoe-shaped valley, where it cools and hardens into black stone. The mountain is covered in crops and the air is fresh and smells like fruit."
I wouldn't really call it a startup, but it's the kind of thing that has helped me save time and money and I enjoy writing the prompts for it.