GPT-3 doesn't allow you to train the model, but requires you to send along the entire dataset with every prompt, so that it costs more than a dollar every time someone interacts with the AI.
You can't, for example, build a chatbot that acts as support on your website. You can't have it read a dictionary and do translations or definitions based off of that.
What can you do? What's the point of the API? Why don't they allow you to train the model on your own data?