We just use the openai freemium layer like everybody else. So, cost for this is so far zero and we are definitely saving time and effort. We'd probably end up paying for this if this starts showing up in mainstream products for creating content. Our CEO actually pays for midjourney, which he uses for mockups and other things. I expect this will start happening pretty soon as there probably are a lot of clued in business people discovering just how useful this is.
You get some free usage, and then pay per token after that. Once you've done that you can play with chatGPT for free, as of now. It does time out fairly frequently since so many people are playing with it.