What are the most popular in-demand categories of prompt templates in Generative AI?

Since the introduction of ChatGPT and other generative ai tools, I have been dabbling in different types of content creation/enhancement such as blogs/articles, affiliate marketing, AI stock media, e-book publishing, and Chrome extension development but my most interesting and recent use of these technologies has been in prompt templates or re-usable prompts for both text-based and image-based generators. Though I believe I have created some interesting prompt templates and have managed to introduce them to a sufficient number of connections, there haven't been any sales of my templates so far even though the marketplace these prompts are being listed is actively using ads and their own social media feeds to promote the available templates as well. Therefore, I wonder if I overestimated the popularity of these categories. So, can anybody tell me what kinds of prompts are in demand these days?