What the parent poster means is that you can use the API to generate many question/answer pairs on which you then train your own model. For a more detailed explanation of this and other related methods, I can recommend this paper: https://arxiv.org/pdf/2402.13116

You don't understand what Gigachad is talking about. You can buy API credits to gain access to a model in the cloud, and then use that to train your own local model though a process called distilling.