You probably should make a personal account which limits the amount of images you can generate a month (10?) and a business account which offers unlimited generation but for a steep price.
Or maybe allow free usage with an added watermark. So that people can try it out on their own screenshot, eventually distribute them internally, and pay when they need to remove the watermark for public distribution.
https://www.tek.no/nyheter/nyhet/i/KnWn0G/ai-flause-for-goog...
You probably should make a personal account which limits the amount of images you can generate a month (10?) and a business account which offers unlimited generation but for a steep price.