I may be misunderstanding your meaning, but I'm not convinced that "prompts as a service" is short term. I think we'll see a number of apps pop up that will be essentially that, i.e. powered by a generative AI, but with a great UX. Not everyone is good at prompting, and although it is a skill many will develop, packaging up great prompts in niche problem areas still looks like an area of opportunity to me. I'm not talking necessarily about chat experiences, but apps that can, as an example, maintain task lists for you after consuming your incoming communications.
I don't understand your comment. I was talking about apps built on LLMs where the prompts aren't given by the users, but the LLM is still an important part of the functionality.
