[D] How all these AI services can afford 5/10/20$ subs per month?

How do various AI-powered services, ranging from speech recognition to OCR and art generation, embedding new data, manage to offer their functionalities at such low costs? Utilizing something like the GPT-4 API can quickly expend $10, and this is similar for other models. Even running something like LLaMA 2 locally involves significant costs. I'm curious about the economic strategies these services employ to maintain low monthly fees while operating these large-scale models.

ai-powered ai services api art art generation costs data embedding gpt gpt-4 gpt-4 api llama low machinelearning ocr per recognition running services something speech speech recognition